Coming up to San Francisco from Los Angeles for my birthday weekend. We're staying at Hotel Nikko near Union Square and are only in town from late Friday through Sunday afternoon. This is a special birthday for me (50th) so I'd love to get some restaurant recommendations from those in the know. We'd like to stay fairly close to the hotel but would be willing to travel if there's a place we shouldn't miss. Not into super-fancy, less is more - into seafood, Italian, steaks, etc.
We've previously been to Sear's Fine Food for breakfast, any other great breakfast spots near Union Square?
Any suggestions would be greatly appreciated. Thanks!