If you go into the lounge you can sort the threads by "largest number of replies"

Here's the Top 10

1. Word Association
2. What are you listening to right now?
3. bud and no papes.
4. GanjaASD847
5. Ok Chatters- Post your pics now
6. Story Line Game
7. Most # of posts
8. Free Sample.......
9. Its Broke ;/
10. Post a pic of yourself.