As an IM client, Google Talk is as simple as they come. So simple, in fact, it does not contain a chat room or group chat feature like many other clients. So, a third-party developer got wise and helped launch PartyChat, which allows Google Talk users to form their own private chat rooms. The end result is an easy-to-use chat experience on Google Talk!
Launching a PartyChat Chat Room. The first step in forming your own chat room is to add PartyChat to your contacts list. Click the “+Add” button on the bottom, left-hand corner of the Google Talk window to begin.