That's not a real chatroom though. Chatrooms are more people to people and you get much quicker responses if you have a question that really doesn't need a topic, or you need a quick answer too.
There are different formats for different purposes. It's highly unlikely that a chatroom capability would be added here. The current concept is so successful, it wouldn't make much sense to change it.
234,000+ members, 2,260,000 threads, 32,000,000 posts. Hard to argue with that much volume.