Because I assume almost every game company runs on coffee, and Technical Artists are surely no exception, here is a list of great coffee places in close proximity to the GDC.
SightGlass Coffee:
Short walk from the Moscone center down Folsom Street- not really many food options, but excellent coffee.
www.sightglasscoffee.com/our-company/locations
Special Extra:
Small coffee cart. The staff are all cool, once again not much in the way of food beyond muffins, but I rate the coffee as some of the best in the bay area. Its down the alley next to the MOMA (building under construction across the street from Yerba Buena park), so its about a five minute walk from the Moscone center.
http://www.yelp.com/biz/special-xtra-san-francisco
Epicenter Cafe:
Good food (lunch, breakfast), beers and good coffee. Also has a batman board game that looks like its from the '70s. I've always wanted to play it, but have never had the chance...
http://www.epicentercafe.com/
Elite Audio:
Another blue bottle cafe- a little hit and miss, but on the balance usually good coffee. They have the same pastries that Sightglass gets, but not as expansive a selection. This is also a five minute walk from Moscone.
http://www.eliteaudiosf.com/menu/
Chrome Cafe:
This is a bit more of a walk, about on the same scale as Sightglass. Tiny cafe, but good, strong coffee. Serves four barrel coffee, which is pretty good.
http://www.yelp.com/biz/chrome-coffee-bar-powered-by-cento-san-francisco
There are a few others, but those are my go-tos. I've also got bars and places to eat if anyone wants suggestions. Give me a shout if you want to catch up and talk coffee/scripting during GDC week.