How do you choose to pay for the party?

It depends on how many people there are at the party and what kind of relationship it is. If it's two or three people, and they are all good friends, then I'll choose the way to treat them, and I'll pay the bill myself. After all, it is normal for friends to invite a meal.

But if there are many people together, and they are all in general relationship, I usually choose AA system, and everyone will share the money equally. I think this is the right choice.