Just last night, while tending bar at Cantina (which I do most Mondays), I chatted with a lovely young couple on vacation from Tuscon. With plans already to see Alcatraz, etc, they asked me what I thought they should do while in town. "Get out and walk the neighborhoods," I told them. "That's where the heart and the identity of San Francisco is. And it's the most fun you can have to see what they're all about."