Many years ago in Florida I was asked for ID at a beach bar. I was probably 27 at the time. I told her that I didn't have any on me, as I was in a bathing suit. She said that alcohol could only be handled by people who could prove they were over 21. I asked to see her ID. She asked me why this was relevant. I told her that she was going to be handling my beer and I wanted to make sure she was old enough to hold a glass bottle. Her boss came over and gave me some long hyperbole speech which boiled down to 'I make the rules around here.' Our group of 7 or 8 big drinkers promptly got up and left.

A little common sense would have netted them probably $250 in an hour.