If you're mostly looking for a babble, and possibly diverge that into an RP, hop into the chatroom and start talking there :)
If you're looking for specific RP's, try to post some RP suggestions. These don't have to be full-blown stories. You could mention the very basics and work out the details with anyone willing to be your writing partner.
Also, for looking for realtime games, you might want to try the "Chat Help and Games" board.