Tipping beatdown #2: If you have the audacity to say that a 15% gratuity is "for my convenience" when I come in with a party of 8 or more, you deserve a beat down. I understand you'll have to bust your balls to service a big group, but having the nerve to say it's for "my convenience" means you are stupid and trying to be slick by putting it in small print at the bottom of a menu.