A lot of things.

Service/Club/ApproverService.php

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+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use XF\App;
+use XF\Entity\Forum;
+use XF\Entity\Node;
+use XF\Service\AbstractService;
+use XF\Util\File;
+
+class ApproverService extends AbstractService
+{
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    public function __construct(App $app, Club $club)
+    {
+        parent::__construct($app);
+
+        $this->club = $club;
+    }
+
+    public function approve(): bool
+    {
+        if( $this->club->club_state !== 'moderated' ) {
+            return false;
+        }
+
+        $this->club->club_state = 'visible';
+        $this->club->save();
+
+        /** @var Node $node */
+        $node = $this->em()->create('XF:Node');
+
+        $node->node_type_id = 'Forum';
+        $node->title = $this->club->title;
+        $node->description = $this->club->description;
+        $node->parent_node_id = \XF::options()->rhpz_club_node_id ?? 0;
+        $node->display_order = 1;
+        $node->save();
+
+        /** @var Forum $forum */
+        $forum = $this->em()->create('XF:Forum');
+        $forum->node_id = $node->node_id;
+        $forum->allow_posting = true;
+        $forum->save();
+
+        $this->club->node_id = $node->node_id;
+        $this->club->save();
+
+        $user = $this->club->User;
+        if( $user ){
+            /** @var ModeratorService $modManage */
+            $modManage = \XF::app()->service('RomhackPlaza\Master:Club\Moderator', $this->club, $user );
+            $modManage->addModerator( $error );
+        }
+
+        return true;
+    }
+}

Service/Club/CreatorService.php

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+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use RomhackPlaza\Master\XF\Entity\Forum;
+use XF\App;
+use XF\Entity\Node;
+use XF\Entity\User;
+use XF\Http\Upload;
+use XF\Service\AbstractService;
+use XF\Service\ValidateAndSavableTrait;
+use XF\Util\File;
+
+class CreatorService extends AbstractService
+{
+    use ValidateAndSavableTrait;
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    /**
+     * @var Upload
+     */
+    protected $bannerUpload;
+
+    /**
+     * @var User
+     */
+    protected $user;
+
+    public function __construct(App $app, User $creator)
+    {
+        parent::__construct($app);
+        $this->club = $this->em()->create('RomhackPlaza\Master:Club');
+        $this->setUser($creator);
+        $this->setupDefaults();
+    }
+
+    protected function setupDefaults()
+    {
+        $this->club->club_state = 'moderated';
+    }
+
+    public function getClub()
+    {
+        return $this->club;
+    }
+
+    public function getUser()
+    {
+        return $this->user;
+    }
+
+    public function setUser(User $user)
+    {
+        $this->user = $user;
+        $this->club->user_id = $this->user->user_id;
+    }
+
+    public function setContent(string $title, string $description )
+    {
+        $this->club->title = $title;
+        $this->club->description = $description;
+    }
+
+    public function setBannerUpload(?Upload $upload = null)
+    {
+        if ($upload) {
+            $upload->requireImage();
+            if($upload->isValid()){
+                $this->bannerUpload = $upload;
+            }
+        }
+    }
+
+    protected function _validate()
+    {
+        $this->club->preSave();
+        return $this->club->getErrors();
+    }
+
+    protected function _save()
+    {
+        $this->club->save();
+
+        if( $this->bannerUpload ){
+            $path = 'data://club_banners/' . $this->club->club_id . '.jpg';
+            if( File::copyFileToAbstractedPath($this->bannerUpload->getFileWrapper()->getFilePath(), $path) ){
+                $this->club->banner_date = \XF::$time;
+                $this->club->save();
+            }
+        }
+
+        return $this->club;
+    }
+}

Service/Club/DeleterService.php

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+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use XF\App;
+use XF\Entity\Forum;
+use XF\Entity\Node;
+use XF\Http\Upload;
+use XF\Service\AbstractService;
+use XF\Service\ValidateAndSavableTrait;
+use XF\Util\File;
+
+class DeleterService extends AbstractService
+{
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    public function __construct(App $app, Club $club)
+    {
+        parent::__construct($app);
+
+        $this->club = $club;
+    }
+
+    public function delete()
+    {
+        if( $this->club->Forum && $this->club->Forum->Node ){
+            $this->club->Forum->Node->delete();
+        }
+
+        $path = 'data://club_banners/' . $this->club->club_id . '.jpg';
+        File::deleteFromAbstractedPath($path);
+
+        $this->club->delete();
+    }
+}

Service/Club/EditorService.php

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+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use XF\App;
+use XF\Entity\Forum;
+use XF\Entity\Node;
+use XF\Http\Upload;
+use XF\Service\AbstractService;
+use XF\Service\ValidateAndSavableTrait;
+use XF\Util\File;
+
+class EditorService extends AbstractService
+{
+    use ValidateAndSavableTrait;
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    public function __construct(App $app, Club $club)
+    {
+        parent::__construct($app);
+
+        $this->club = $club;
+    }
+
+    public function setContent(string $title, string $description)
+    {
+        $this->club->title = $title;
+        $this->club->description = $description;
+    }
+
+    public function setBannerUpload(?Upload $upload = null)
+    {
+        if( $upload ){
+            $upload->requireImage();
+            if( $upload->isValid() ){
+                $path = 'data://club_banners/' . $this->club->club_id . '.jpg';
+                if(File::copyFileToAbstractedPath($upload->getFileWrapper()->getFilePath(), $path)){
+                    $this->club->banner_date = \XF::$time;
+                }
+            }
+        }
+    }
+
+    protected function syncForumNode()
+    {
+        if( $this->club->Forum && $this->club->Forum->Node )
+        {
+            $node = $this->club->Forum->Node;
+            $node->title = $this->club->title;
+            $node->description = $this->club->description;
+            $node->save();
+        }
+    }
+
+    protected function _validate()
+    {
+        $this->club->preSave();
+        return $this->club->getErrors();
+    }
+
+    protected function _save()
+    {
+        $this->club->save();
+        $this->syncForumNode();
+
+        return $this->club;
+    }
+}

Service/Club/ModeratorService.php

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+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use XF\App;
+use XF\Entity\User;
+use XF\Service\AbstractService;
+
+class ModeratorService extends AbstractService
+{
+
+    public const int MAX_MODS = 5;
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    /**
+     * @var User
+     */
+    protected $user;
+
+    public function __construct(App $app, Club $club, User $moderator)
+    {
+        parent::__construct($app);
+        $this->club = $club;
+        $this->user = $moderator;
+    }
+
+    protected function countMods( int $nodeId, int $excludeUserId = 0 )
+    {
+        return $this->finder('XF:ModeratorContent')
+            ->where('content_type', 'node')
+            ->where('content_id', $nodeId)
+            ->where('user_id', '!=', $excludeUserId)
+            ->total();
+    }
+
+    public function addModerator( string &$error ): bool
+    {
+        if( !$this->club->Forum || !$this->club->Forum->Node ) {
+            $error = "No node linked to this club.";
+            return false;
+        }
+
+        if( $this->countMods( $this->club->node_id, $this->club->user_id ) > self::MAX_MODS ) {
+            $error = "The limit of 5 moderators has been reached.";
+            return false;
+        }
+
+        $existingMod = $this->em()->findOne('XF:ModeratorContent', [
+            'content_type' => 'node',
+            'content_id' => $this->club->node_id,
+            'user_id' => $this->user->user_id
+        ]);
+        if( $existingMod ){
+            $error = "This user is already a moderator.";
+            return false;
+        }
+
+        $modContent = $this->em()->create('XF:ModeratorContent');
+        $modContent->content_type = 'node';
+        $modContent->content_id = $this->club->node_id;
+        $modContent->user_id = $this->user->user_id;
+        $modContent->save();
+
+        $permissionUpdater = \XF::app()->service('XF:UpdatePermissions');
+        $permissionUpdater->setContent('node', $this->club->node_id);
+        $permissionUpdater->setUser($this->user);
+        $permissionUpdater->updatePermissions(Club::MOD_PERMISSIONS);
+
+        \XF::app()->jobManager()->enqueueUnique('permissionRebuild', 'XF:PermissionRebuild');
+        return true;
+    }
+
+    public function deleteModerator( string &$error ): bool
+    {
+        if( !$this->club->Forum || !$this->club->Forum->Node ) {
+            $error = "No node linked to this club.";
+            return false;
+        }
+
+        if( $this->user->user_id === $this->club->user_id ){
+            $error = "You cannot delete yourself.";
+            return false;
+        }
+
+        $mod = $this->em()->findOne('XF:ModeratorContent', [
+            'content_type' => 'node',
+            'content_id' => $this->club->node_id,
+            'user_id' => $this->user->user_id
+        ]);
+
+        if( $mod ){
+            $mod->delete();
+
+            \XF::db()->delete('xf_permission_entry_content', 'content_type = ? AND content_id = ? AND user_id = ?', ['node', $this->club->node_id, $this->user->user_id]);
+
+            \XF::app()->jobManager()->enqueueUnique('permissionRebuild', 'XF:PermissionRebuild');
+        }
+
+        return true;
+    }
+}