Sutro Project / Amoeba Music
Amoeba is by-far San Francisco's biggest and best known music store. Some claim it the best record store in the world.
Be careful, don't buy more than you can carry... and try to save some new music for tomorrow or the next day :)
There are also many live (free!) in-store shows, usually in the evenings - check the calendar!
Address: 1855 Haight st, SF, CA
Website: http://www.amoeba.com/live-shows/calendars.html
Wikipedia: http://en.wikipedia.org/wiki/Amoeba_Music
