The one I used in Baltimore was a large goblett, which filled up nightly--nice touch, looked classy and on one occasion there was more money in the jar than I was paid by the club's owner.

I never played piano, so I don't know about tips for piano players, but when I played the guitar, tips were rare. With the keyboard, the jar fills to capacity.

Keep in mind that there is only one thing money cannot buy--poverty. You can rent all the other things!

Cheers,

Gary