When Gov’t Mule was just getting started, they played a local club in OKC. A friend and I went to the club early in the afternoon to find out when the doors would open and ran into Warren Haynes walking down the street. After talking for a few minutes, Allen Woody walked up and joined us. Then Matt Abts came along. While they were signing some CDs we brought, my friend asked what they were doing wandering the streets. They had spotted a laundromat down the street and were taking advantage of the opportunity. Ah, the glamorous life of a rock star!
My (female) friend struck up a friendship with Allen (and their “tour mystic”, Kirk West) which led to us going to Atlanta for a New Year’s show (recorded and released as “…With A Little Help From Our Friends”). There I met Bernie Worrell (in the hotel lobby), Phil Walden, Jr. (briefly) and shook hands (gently) with Derek Trucks. All were very nice, down-to-earth people and Bernie was a character, flirting with my friend while his wife stood by laughing and telling her “Don’t worry, honey, he’s all talk.”
A couple of years later we saw Storyville in another club and got to meet Chris Layton and Tommy Shannon (aka “Double Trouble”) afterward. Also some very nice people.
I don’t know if it counts, but a long time ago I saw a band called Little Sister play (several times), met the band and got autographs. The singer is now on RockStar:Supernova. Her name is Patrice Pike. (I think she was about twelve years old back then. 
) If you’ve only ever seen her there, you ain’t seen nothin’ yet! That girl can seriously rock a house!