Hmmm... I like the chatrooms PI has, they've been a lot of fun. We use groupboard which while it has had it's issues it has a drawling board and games, and I have fond memories of fun times in the PI ones.
http://www.groupboard.comYou need to host it somewhere is the only thing... but if you have no where, I could host it on my own site for you (just like the PI ones). You could then have a sticky topic linking to it.
Just an idea... thought I'd say...
I can't show mine as an example because they are members only, but Ace has seen them...