George Coleman was one of the first of the "old" guys I saw live... when he was on tour with Ahmad Jamal (there's an official release from Paris).
They played a long (85min) festival set, Jamal opening in trio (with James Cammack and a fiery Idris Muhammad) and after half an hour, Coleman joined. I got in for free (or rather: for handing out some flyers at the end) and was standing at the side, but right front, a few metres next to Coleman, watching him play... very fond memories there!
Never managed to catch him again afterwards, not even sure he ever made it to a nearby place.
Anyway, that Zurich concert was broadcast in its entirety and I revisited it many times!