Via Wonkblog, here's a chart showing the pay gap between men and women in the restaurant industry. It comes from a recently released EPI report, and as you can see, not only are men better paid in virtually every category, but the premium goes up for the highest paying jobs. Bussers and cashiers are paid nearly the same regardless of gender. But when you move up to cooks, bartenders, and managers, the premium ranges from 10-20 percent.
This data isn't conclusive. There are other reasons besides gender for pay gaps, and the EPI report lists several of them. Whites make more than blacks. High school grads make more than dropouts. Older workers make more than younger ones. You'd need to control for all this and more to get a more accurate picture of the gender gap.
But in a way, that misses the point. There are lots of reasons for the gender gap in pay. Some is just plain discrimination. Some is because women take off more time to raise children. Some is because women are encouraged to take different kinds of jobs. But all of these are symptoms of the same thing. In a myriad of ways, women still don't get a fair shake.