(I remembered this yesterday while writing a comment about something else, but LeechBlock stopped me before I was able to write it here.)
The black keys on a piano keyboard form a pentatonic scale; that is to say, so long as you have an anywhere-near-decent sense of rhythm, nearly anything you can improvise using those keys alone will sound good. Non-musicians will be pretty unlikely to notice what you’re doing, if they aren’t very close to you.
(I remembered this yesterday while writing a comment about something else, but LeechBlock stopped me before I was able to write it here.)
The black keys on a piano keyboard form a pentatonic scale; that is to say, so long as you have an anywhere-near-decent sense of rhythm, nearly anything you can improvise using those keys alone will sound good. Non-musicians will be pretty unlikely to notice what you’re doing, if they aren’t very close to you.
IIRC There’s a video (TED talk?) out there of a guy using this for audience participation, to great effect.
Edit: Here.
Wow, that’s a big help to me. I can never remember the pentatonic scale, so that alone acts as an easy reference no matter what key I’m in.