In the days of black and white TV or shortly after that, there was an episode of Adam 12 that I thought was one of the funniest I've ever seen, and still remember it (or something close to it). Reed and Malloy were I believe having breakfast or lunch at a diner when they were asked to deal with a homeless type guy who had come in and asked for a cup of hot water (free) into which he poured some ketchup to make Tomato soup. The restaurant wanted the guy arrested, but they asked if ketchup was free? Yes. Is hot water free? Yes. Then what is the problem?

On the way out, the waitress who made the stink collected the money, and asked them, one penny you call that a tip?

Reed looks at her and says "No Ma'am, I call that a hint" and they left.