My wife and I ate at a Mexican restaurant, somewhere in the vicinity of the Grand Canyon several years ago, we noticed , on the menu at the bottom, in very small print, a note that said, "a 15% gratuity has been added to all menu prices". Many people were leaving tips, presumably, not having seen that very small notice.
Just when was a law passed that makes it illegal to NOT leave a tip? Tipping for good service has been a tradition and NEVER a law.