cheap bastards

I walked out of a resturaunt and I realized that I had no dollar bills to give as a tip, but I had four quarters. So I decided that it would be hilarious if I got in the car and said "Wait a minute kid, I got something for ya, then I reached in my pocket and pulled out two quarters." But I...

should you tip at a Buffett ? its not like the wait staff does much , if you tip How much ?