California Yoga Company at 1650 Bush Street, San Francisco, California.

Really excellent classes with an attentive, caring instructor.
Unfortunately, as someone who's never been into yoga, I would have passed this place up if my friend didn't drag me to a class one time. But I instantly fell in love and became a regular. Brian has been a very considerate and involved instructor, and his classes are intense! I never fail to feel better afterward: I've gotten better sleep, my mood has improved, and I'm excited for the next class.
Brian's class has pushed me to want to really improve my physicality. Definitely worth a shot.