There is a gal who plays piano there for events with the name Nicole Pesce that is absolutely fantastic and worth your time. I saw her play and was just blown away--talk about A+ entertainment for the price of a drink and maybe some snack to eat. If you have nothing to do some day call the Ritz and find out when the entertainment is there and goooooo. You won't regret it! By the way, she has played for years and for a great number of stars and events, so she is no beginner by any means.
Also, valet your car because parking is really hard to do there.