Beautiful building, in a nice area to walk around (not far from where you can get a good view of Golden Gate Bridge).
The marketplace has lots of great shops and restaurants in it, and is a nice place to walk around (plus, views of the Bay). And there's a good farmers market on Tuesdays, Thursdays, and Saturdays.
Excellent Greek sandwiches. The salads, potatoes, and frozen yogurt are great, too. There are additional locations on Divisadero and in the Mission.
Possibly the best sandwiches in the city. Definitely a weekday lunch place in terms of hours. No seating, but you can take your sandwiches to Yerba Buena Gardens nearby.
No-frills 24-hour donut shop serving basically perfect versions of classic donut and pastry styles (old fashioned, cake, raised, apple fritter, danish, etc.).
I like their ice cream a lot, but the real draw is the old fashioned-style soda fountain. Their food is also good, and they have an outpost in the Castro as well.
Great place for tacos if you're looking for a sit-down restaurant. There are also locations in the Marina and North Beach.
Vegan sushi, using vegetables instead of fish for an experience as pleasing to the eye as it is to the palate.
