It seems there is a Bay Area Curling Club in San Francisco:
http://www.bayareacurling.com
I wasn't too sure of the rules either of curling, so I looked it up and found this page which does help explain a few things:
http://en.wikipedia.org/wiki/Curling
I actually want to try curling, but the only Olympic sports I've done are ice skating and skiing, but nowhere near the level of the Olympians.