Please note: about half of these people, I met in my 20's, when I worked in Old Town Pasadena, CA. The place I worked at, a lot of TV celebs came in from time to time.
Ice T
Rob Zombie
Henry Rollins (dude was YOKED, back in the day. He's still pretty big for his age.)
Stephen Hawking (yes, THAT Stephen Hawking)
Jeff Goldblum
Jimmy Smitts (dude is a HELLUVA cool guy. Very down-to-earth.)
John de Lancie
Robert Picardo
Tim Russ (Tuvak from Star Trek Voyager)
Chuck Norris
David Spade (dude is SHORT...)
Walter Jones (the original Black Power Ranger)
The following are only a big deal if you like Industrial / electronic music:
Sascha Konietzko (KMFDM)
Andy LaPlegua (Combichrist, Icon of Coil)
Daniel Graves (Aesthetic Perfection)
Sami Mark Yahya (Faderhead)
Lynn Standafer (end.user)
and I've crashed a party at the Playboy mansion.