diff --git a/lib/backend/room.dart b/lib/backend/room.dart
index 0039a67..799edcf 100644
--- a/lib/backend/room.dart
+++ b/lib/backend/room.dart
@@ -263,16 +263,25 @@ class Room {
     await db.collection('rooms').doc('$id@$serverTag').set(toMap());
   }
 
-  static Future<Room> fromDisk({required String id, required String serverTag}) async {
+  Future<void> removeDisk() async {
+    final db = Localstore.instance;
+    // NOTE: Because categories, products and entries
+    // are supposed to be stored in the room object
+    // (they are just not read by Room.fromDisk)
+    // deleting the document from the collection
+    // should also get rid of affiliated collections
+    await db.collection('rooms').doc('$id@$serverTag').delete();
+  }
+
+  static Future<Room> fromDisk(
+      {required String id, required String serverTag}) async {
     final db = Localstore.instance;
     final raw = await db.collection('rooms').doc('$id@$serverTag').get();
     return Room.fromMap(raw!);
   }
 }
 
-class ShoppingListItem {
-
-}
+class ShoppingListItem {}
 
 class RoomMember {
   final String id;
diff --git a/lib/screens/room/about.dart b/lib/screens/room/about.dart
index fb41519..8e2ffd7 100644
--- a/lib/screens/room/about.dart
+++ b/lib/screens/room/about.dart
@@ -149,8 +149,7 @@ class _AboutRoomPageState extends State<AboutRoomPage> {
                                             scaffMgr.hideCurrentSnackBar();
                                             scaffMgr.showSnackBar(snackBar);
                                           }
-                                        } catch (e) {
-                                          print(e);
+                                        } catch (_) {
                                           // network error
                                           final snackBar = SnackBar(
                                             behavior: SnackBarBehavior.floating,
@@ -235,14 +234,116 @@ class _AboutRoomPageState extends State<AboutRoomPage> {
             ],
           )),
 
-      Padding(
-          padding: const EdgeInsets.all(8),
-          child: FilledButton.tonal(
-            child: const Text('Leave Room'),
-            onPressed: () {
-              // TODO: show confirm dialog
-            },
-          ))
+      ...(widget.info != null)
+          ? [
+              Padding(
+                  padding: const EdgeInsets.all(8),
+                  child: FilledButton.tonal(
+                    child: Text(((widget.info?.isOwner)!)
+                        ? 'Delete Room'
+                        : 'Leave Room'),
+                    onPressed: () {
+                      // show confirm dialog
+                      showDialog(
+                          context: context,
+                          builder: (ctx) => AlertDialog(
+                                title: Text(((widget.info?.isOwner)!)
+                                    ? 'Delete Room'
+                                    : 'Leave Room'),
+                                content: Text(
+                                    'Do you really want to ${((widget.info?.isOwner)!) ? "delete" : "leave"} the room?'),
+                                actions: [
+                                  TextButton(
+                                    onPressed: () {
+                                      // close popup
+                                      Navigator.of(ctx).pop();
+                                    },
+                                    child: const Text('Cancel'),
+                                  ),
+                                  FilledButton(
+                                    onPressed: () async {
+                                      // send request
+                                      final scaffMgr =
+                                          ScaffoldMessenger.of(ctx);
+                                      final nav = Navigator.of(ctx);
+                                      final rmaster = Routemaster.of(ctx);
+
+                                      User user;
+                                      try {
+                                        user = await User.fromDisk();
+                                      } catch (_) {
+                                        // probably not logged in
+                                        nav.pop();
+                                        return;
+                                      }
+
+                                      try {
+                                        final resp = await postWithCreadentials(
+                                            path: ((widget.info?.isOwner)!)
+                                                ? 'deleteRoom'
+                                                : 'leaveRoom',
+                                            target: user.server,
+                                            body: {
+                                              'room': widget.room?.id,
+                                              'server':
+                                                  (widget.room?.serverTag)!,
+                                            },
+                                            credentials: user);
+                                        if (resp.res == Result.ok) {
+                                          // try delete room from disk
+                                          try {
+                                            await widget.room?.removeDisk();
+                                          } catch (_) {}
+
+                                          // go back home
+                                          rmaster.replace('/');
+                                        } else {
+                                          // server error
+                                          final snackBar = SnackBar(
+                                            behavior: SnackBarBehavior.floating,
+                                            content:
+                                                Text(errorAsString(resp.body)),
+                                            action: SnackBarAction(
+                                              label: 'Dismiss',
+                                              onPressed: () {
+                                                scaffMgr.hideCurrentSnackBar();
+                                              },
+                                            ),
+                                          );
+
+                                          scaffMgr.hideCurrentSnackBar();
+                                          scaffMgr.showSnackBar(snackBar);
+                                        }
+                                      } catch (_) {
+                                        // network error
+                                        final snackBar = SnackBar(
+                                          behavior: SnackBarBehavior.floating,
+                                          content: const Text('Network error'),
+                                          action: SnackBarAction(
+                                            label: 'Dismiss',
+                                            onPressed: () {
+                                              scaffMgr.hideCurrentSnackBar();
+                                            },
+                                          ),
+                                        );
+
+                                        scaffMgr.hideCurrentSnackBar();
+                                        scaffMgr.showSnackBar(snackBar);
+                                      }
+
+                                      // close popup
+                                      nav.pop();
+                                    },
+                                    child: Text(((widget.info?.isOwner)!)
+                                        ? 'Delete'
+                                        : 'Leave'),
+                                  )
+                                ],
+                              ));
+                    },
+                  ))
+            ]
+          : [],
     ]));
   }
 }