I have friends that are bartenders and usually, on a good weekend, a good looking girl in a club will take home about 600-800 in tip money. That's for working from 10-11PM to 3 AM serving drinks.
Roughly 100$ an hour to serve drinks in a nightclub. After the chicks worked about 50 hours, she's paid off her boobjob and is making 4 times what I make without somewhat of a high school degree. And the way they talk, it's as if they're entitled to it. Obviously i try to stay within the norm since I like to get served my drinks but it's just ridiculous.
In Europe, most places, it's included in the bill.