+10
Some people don't seem to understand that waitresses and waitors work off of tips. Its completely normal to be taken aback when you get no compensation for being their bitch all night. You kind of stare at them and they stare back and its just like "oh, I'm sorry, I was waiting for a decent human being to show up" amirite?
In some countries, a 10% servive fee actually gets added to the bill regardless of how well you were waited on. Also, you should only get a tip when you deserve one.