When Mr. Pink made his famous speech in defense of not tipping in Reservoir Dogs, he left out a very basic point. Waiters don't make the minimum wage; they live off our decency. Workers have more to worry about than European-style tippers, though: A group of them has sued the management of the Old Homestead Steakhouse, to the tune of $1 million, for skimming their pool of gratuities. That suit is small potatoes, however, compared to the massive class-action case against Fireman Hospitality Group, brought to our attention by the Restaurant Opportunities Commission.