A couple of tales from me, I think I might have mentioned one in another thread.
We were forming a band in the mid eighties playing rock covers and auditioning for a drummer, a teenager came along with his dad, great little drummer, but we rejected him only because of the age difference, he was about fifteen years younger than the rest of us, his name was Mark Heaney.
Mark went on to play with The Seahorses, The Shining and Gang of Four, he is a world renowned session drummer who has toured and recorded with many big named artists/bands.
I played in a Free tribute band around 2008 and our original drummer quit due to a clash of commitments with his function band, our guitarist was the head guitar tutor for schools in Lincolnshire and had done several seminars with a well known drummer, this guy then became our new drummer in the Free tribute, his name was Jeff Rich ex Status Quo, Jeff was a real down to earth bloke and it was a great experience to share the stage with him on many gigs.