Blue Bottle Coffee
, 66 Mint Plaza
San Francisco, CA

c (510) 653-3394

w http://bluebottlecoffee.net
Must Do This is where coffee is taken seriously. It's in a place called Mint Plaza; the signage is bad but it's on a little corner tucked into Mint Plaza. If you ask around you'll find it. Take my advice and order a single-origin cappuccino; it's a bit more expensive but worth it!