Way too many to list!
The vast majority of my fond musical memories are live concerts. Also, I have just as many fond musical memories from very recent times, as I do from my youth.
Just at the Roxy alone, I could go on for a page.
I was at the Roxy (Los Angeles) for the "Roxy and Elsewhere" gig.
Also at the Roxy: Genesis (1973), King Crimson (1981), Premiata Forneria Marconi (1976), Wynton Marsalis (1982) .
Shrine Auditorium: King Crimson (1974), Gentle Giant (with Renaissance opening) (1976), Mahavishnu Orchestra (1976?).
At the Hollywood Bowl. John McLaughlin, Al Di Meola, Paco DeLucia. This was the gig just before the the "Friday Night in San Francisco", and more recent release, "Saturday Night...", gigs were recorded.