Famous people I've waited on. (That I can remember anyway, there were so many when I worked in trendy Los Angeles restos.)
Goldie Hawn (several times)
Kurt Russell (several times)
Arnold Schwarzenegger (many times)*
Maria Schriver(many times)*
Rod Stewart (twice)
They're all just regular people, except for Maria, who's an unmitigated bitch, and her hubby, who is, well I don't need to tell you, just watch him being governor.
*interesting story there - one day it'll be blogged