Good clean look, like the ability to instantly view without signing in, though I can see good and bad from that as well. First its a low barrier of entry to observe, but that could deter others from as openly engaging, and also was slightly confusing to need to sign in when it appear to already be live.

Also, is there a need to require a signed in user, or could you allow anonymous users as well? It seems like that would really improve engagement. Finally, is any ability for users to moderate/administer certain chats, it wasn't immediately clear that there was?