Go talk to anybody who has worked for tips - Waiters want as much turnover as possible. It's better to get two tips of 20% then one tip of 25%. Of course, this

Go talk to anybody who has worked for tips - Waiters want as much turnover as possible. It's better to get two tips of 20% then one tip of 25%. Of course, this doesn't apply when the restaurant is totally empty. Then, they'd rather you stay and keep ordering things to bump up their tips.