To the anti-tipping comments:
If you're against tipping, the correct thing to do: Attempt to pass a law requiring it is outlawed and waiters/bartenders make a normal wage.
Wrong thing: Not tip!
As a former bartender, who made $2.25 an hour plus tips.... you realize if you didn't tip, I'd essentially be making your drink for free? Sorry but no, since tipping is the norm, do it. When I bartended I made about $25 an hour in tips... so you're saying people should feel fine going to just minimum wage? Again, since its the norm, that's what you need to do. Otherwise, don't go out.
And on the topic of "just sue them". Umm.... your privilege is showing. As said above, there would be no real proof, plus a low wage individual going up against a big chain, I HIGHLY doubt that would work, and then they'd be in debt from the ordeal. I mean seriously, I've had lots of illegal things happen at jobs (sexual harassment, etc), and I'm not exactly alone in this... most women in general have experienced this type of things at jobs, it's almost the norm. When I started my last bartending job, I wasn't even legally on the books for the first 6 months. So if they refused to pay me, how would I have sued?