I will die with (in the old Song Book) song 32, Gratitude for Divine Patience in my head. As kids in the hall, when you had a real piano at the KH, we would practice that after the meetings.
I know nothing else on the piano, but I can play that song with with three or four fingers to this day.
It's kind of scary. When I hear Billy Joel's Piano Man, I get flashbacks to that song and break out in a cold sweat.