I still like what a group of Geeks did awhile back when they got together. They each put in like $ 7.00 each in $ 1.00 bills in a big pile in the middle of the table. They told the waitress whatever is left when we finish is yous. But every time we have a problem, have to ask for a refill or whatever. We are going to take back a $ 1.00 or $ 2.00. Sometimes when they had good service, there was a lot left. Other times there was nothing. But it acted as a gauge on how well the service was going.
I still say "It is my Money & I will tip what I want to" (Think of the JG Wentworth Commericals)