For a hundred buck meal I'd tip about 15$. But I don't buy the percentage thing. Some times I'll have a 8$ meal but I'll still leave at least 2 bucks even though thats more than 15%. When my grandfather passed, the rich side of my family came to america and we rang up a 6000$ meal between us (15 people) in a resturant in DC. The waiters did not get a 900$ tip though and really they shouldn't. They had good service and all but its not like the quality of the food or the price of it made it harder to do their jobs. There was a team of 3 of them and the total tip was 400$.


edit: as a side note they day we buried my grandfather was also my birthday, how about that for conflicting emotions.