According to the Thursday, Sept 4th SF Chronicle, Prince was recently sighted at the Four Seasons Hotel bar. Here's the text:

The Eagles' Glen Frey was surrounded by young groupies in the wee small hours at the Four Seasons bar after the group's recent show in San Jose, and in the same place, 24 hours later at 3am, Prince and his wife, Manuela Testolini, all alone but for a TIC spy, were noodling on the piano and nuzzling on the bench.

A nice file photo of Prince is attached. Sorry, I do not have a link. I hope he enjoyed SF!