People don't use it much because you can never tell when someone's in it to chat to. The "who's in chat" box shows occupants for hours after they left, and no-one wants to wait in chat twiddling his thumbs on the off chance someone else might pop in. Beats me how chats ever get started.
Come and join in the chat. There's scandalous flirting, hot tempered arguments and chilled out debating... or at least there would be if there was anyone in there .