"I liked what you guys were trying to do up there" - From a blues cover band gig when I was in college.
"Man that song was great - sounded like a funky James Taylor" - From a well-meaning (but disastrously misguided) fan at one of my old original funk band's gigs in Boston in the 90s. I endured my new title, "Funky Taylor", which my bandmates enjoyed to no end, for the ensuing next 6 months.
And the best of all:
"I play strap-on." - From a rather competitive, rooster-mullet-sporting keyboardist who was in an opening band in response to my question "what do you play?". I was young and at the time had not developed the necessary laughter-supression skills that such a situation demands.
Afterwards, during our set, in between songs I may or may not have blurted out "strap on" into the mic in every imitative voice I had at the time, from GWAR to Fred Schneider to Frank Zappa.