No topics... just smooth conversation & chilling. 
Don’t be a vibe KILLER: Try to keep it loose & chill. It’s okay to go deep but if your a$$ woke up in a terrible mood maybe take 10 before you come in the lounge with your nonsense. Go have some tea or a smoke buddy ..
This is a public yet valid space: These convos will go everywhere but you’re not allowed to take a room over with your individual disapproval. If everyone is chilling & having a good convo & you’re not okay ... go step outside. 
Check yourself : Try to be hydrated, somewhat fed & don’t mess up a good vibe with a snippy attitude. 