I don't know if it qualifies, but I 'stumbled' into a 311 garage party in Omaha back in the early 90s. It was right about the time they'd released their first major studio album.
Just a house w/ a two car garage in a middle class neighborhood. Maybe one of their parents houses for all I know. I was with a date, she knew the band, knew they'd be rehearsing, and suggested we stop in. I had no idea they'd go on to success.
"Really digging" them is a stretch though. I recognize their music when someone plays it on a jukebox, but I got stuck in the 60s, 70s, 80s.