Hey, Bobby. Nice potato salad.
Okay, Enthusiasts: Nerd Time! This is 5/25/72 from the Strand Lyceum in London, and they’re playing Good Lovin’. How do we know this? Because Garcia is not, contrary to your first instinct, hunched over his pedal steel guitar, but covering the organ for Pig while he sings. Go listen: there’s only one guitar for the first five minutes of the tune, and the guy playing the B3 doesn’t quite know what he’s doing.
We also know that Garcia played the piano on 9/20/70 at the Fillmore East for what would turn out to be the last performance of To Lay Me Down for three years:
So: was that it or did Garcia ever play keyboards onstage other than these two times?