Like a great manager I worked with, said, ” this is not food business; this is people business, because the food is not going to serve itself or make itself, there is people working for you and people that struggle to make it happen. The next time you go to a restaurant, DO NOT be a dick about the tip. If you don’t know how much you should tip, just double the tax amount in your check and that should be fine, if Not 20% is always right. Don’t think of yourself as a god, giving precious life “money” to someone under you, because at the end You and I will rot underground, we are all mortals. being humble is the way to go.