Now that's definitely cause for
I think it's ridiculous, I just paid $150 for a meal, you add a mandatory 18% gratuity because there were 10 people and I should still have to add another 15-20%? Let's assume everyone spent the same amount, the meal took 2 hours, and the gratuity was split between 4 waiters, that's still $33/hr on top of whatever the restaurant pays them. Are you trying to tell me a waiter deserves $60 an hour to serve a table of 10, split with 3 other waiters?