When I'm with friends, if someone is playing the guitar, I will sit on the appropriate side of them to hang onto the top of the guitar (although I always ask first) so I can feel the vibrations as well as listen. With pianos, I will always stick my hand on, and depending on the situation, I sometimes open the top of the piano so I can watch the piano playing.
Does anyone else do any of this?
Does anyone else do any of this?