A lot of things.

_output/templates/public/club_delete_confirm.html

@@ -0,0 +1,13 @@
+<xf:title>Delete club : {$club.title}</xf:title>
+
+<xf:form action="{{ link('clubs/delete', $club) }}" class="block">
+    <div class="block-container">
+        <div class="block-body">
+            <xf:inforow rowtype="confirm">
+                Are you sure you want to delete this club ? <strong>{$club.title}</strong> ?<br />
+                <span class="u-muted">Deleting this will also delete all threads and posts.</span>
+            </xf:inforow>
+        </div>
+        <xf:submitrow rowtype="simple" icon="delete" submit="Delete" />
+    </div>
+</xf:form>