Of course, having a celebrity there on the same day you are there doesn't mean they'd be there at exactly at the same time and, even if they are, that you'd see them (some use private rooms).
As a kid, once saw Alan Hale (the Skipper on Gilligan's Island) standing out front of his seafood restaurant on Restaurant Row. Don Drysdale's Dugout was near where we lived in Van Nuys, but we never went so never saw if he hung out there.