diff --git a/pkg/api/api.go b/pkg/api/api.go
index cfdafe0a..6f53154d 100644
--- a/pkg/api/api.go
+++ b/pkg/api/api.go
@@ -79,6 +79,7 @@ const (
 	ToggleMultitap   PT = 109
 	RecordGame       PT = 110
 	GetWorkerList    PT = 111
+	ErrNoFreeSlots   PT = 112
 	RegisterRoom     PT = 201
 	CloseRoom        PT = 202
 	IceCandidate        = WebrtcIce
diff --git a/pkg/coordinator/hub.go b/pkg/coordinator/hub.go
index 6331aef4..bc815d9d 100644
--- a/pkg/coordinator/hub.go
+++ b/pkg/coordinator/hub.go
@@ -66,6 +66,7 @@ func (h *Hub) handleUserConnection() http.HandlerFunc {
 		params := r.URL.Query()
 		worker := h.findWorkerFor(user, params, h.log.Extend(h.log.With().Str("cid", user.Id().Short())))
 		if worker == nil {
+			user.Notify(api.ErrNoFreeSlots, "")
 			h.log.Info().Msg("no free workers")
 			return
 		}
diff --git a/web/js/api/api.js b/web/js/api/api.js
index 7fafe225..bbb21318 100644
--- a/web/js/api/api.js
+++ b/web/js/api/api.js
@@ -20,6 +20,7 @@ const api = (() => {
         GAME_TOGGLE_MULTITAP: 109,
         GAME_RECORDING: 110,
         GET_WORKER_LIST: 111,
+        GAME_ERROR_NO_FREE_SLOTS: 112,
     });
 
     const packet = (type, payload, id) => {
diff --git a/web/js/controller.js b/web/js/controller.js
index ab0ad129..eb7cd05a 100644
--- a/web/js/controller.js
+++ b/web/js/controller.js
@@ -214,6 +214,9 @@
             case api.endpoint.GAME_RECORDING:
                 event.pub(RECORDING_STATUS_CHANGED, payload);
                 break;
+            case api.endpoint.GAME_ERROR_NO_FREE_SLOTS:
+                event.pub(GAME_ERROR_NO_FREE_SLOTS);
+                break;
         }
     }
 
@@ -482,10 +485,8 @@
     event.sub(GAME_PLAYER_IDX_SET, idx => {
         if (!isNaN(+idx)) message.show(+idx + 1);
     });
+    event.sub(GAME_ERROR_NO_FREE_SLOTS, () => message.show("No free slots :(", 2500));
     event.sub(WEBRTC_NEW_CONNECTION, (data) => {
-        // if (pingPong) {
-        //     webrtc.setMessageHandler(onWebrtcMessage);
-        // }
         workerManager.whoami(data.wid);
         webrtc.start(data.ice);
         api.server.initWebrtc()
diff --git a/web/js/event/event.js b/web/js/event/event.js
index 922d468f..9ad45a4b 100644
--- a/web/js/event/event.js
+++ b/web/js/event/event.js
@@ -65,6 +65,7 @@ const GAME_SAVED = 'gameSaved';
 const GAME_LOADED = 'gameLoaded';
 const GAME_PLAYER_IDX = 'gamePlayerIndex';
 const GAME_PLAYER_IDX_SET = 'gamePlayerIndexSet'
+const GAME_ERROR_NO_FREE_SLOTS = 'gameNoFreeSlots'
 
 const WEBRTC_CONNECTION_CLOSED = 'webrtcConnectionClosed';
 const WEBRTC_CONNECTION_READY = 'webrtcConnectionReady';
diff --git a/web/js/gui/message.js b/web/js/gui/message.js
index d4bf668c..598d69e9 100644
--- a/web/js/gui/message.js
+++ b/web/js/gui/message.js
@@ -12,7 +12,7 @@ const message = (() => {
 
     let isScreenFree = true;
 
-    const _popup = () => {
+    const _popup = (time = 1000) => {
         // recursion edge case:
         // no messages in the queue or one on the screen
         if (!(queue.length > 0 && isScreenFree)) {
@@ -21,7 +21,7 @@ const message = (() => {
 
         isScreenFree = false;
         popupBox.innerText = queue.shift();
-        gui.anim.fadeInOut(popupBox, 1000, .05).finally(() => {
+        gui.anim.fadeInOut(popupBox, time, .05).finally(() => {
             isScreenFree = true;
             _popup();
         })
@@ -33,14 +33,12 @@ const message = (() => {
         }
     }
 
-    const _proceed = (text) => {
+    const _proceed = (text, time) => {
         _storeMessage(text);
-        _popup();
+        _popup(time);
     }
 
-    const show = (text) => {
-        _proceed(text)
-    }
+    const show = (text, time = 1000) => _proceed(text, time)
 
     return Object.freeze({
         show: show