Anon asked: What if foursome was Azula's idea? How would she come up with it? And how would she convince others to go along with this?

It would 100% be something she considered many times before, but didn't actually try to make happen until The Beach. What better way to prove that she is absolutely superior to everyone than screwing her two best friends AND her brother.

After they destroyed the party, I can see Azula "casually" suggesting them to steal some drinks, but she wouldn't drink any herself, being the only sober member of the group.

She'd probably make the moves on Ty Lee first, and have her help her convince Mai and Zuko. They'd both look horrified at them… but Mai would give him a look that basically says "I'm in if you are". Zuko would try to say that this would be wrong… and give in the second Azula kissed him.