Imperial Tea Court now has two locations. One in the Ferry Building and
its older location on Powell just north of Broadway.
http://www.imperialtea.com/

If you enjoy Japanese tea, DO NOT miss stopping by Shifuku Tea & Arts
in the Japan Center. Please tell David I say hello.

Shifuku Tea & Arts
Japan Center
1737 Post Street Suite 337
San Francisco Ca 94115
(415) 922-5505

I've never stopped in to this place but would like to:
Yau Hing Company
831 Grant Avenue
San Francisco, California 94108
Phone: (415) 395-0868
Open 9:30am to 6:00pm, Daily
http://www.redblossomtea.com/

If you like sweets you should wait in line at the Golden Gate Bakery -
I believe it might be on Grant but I'm not sure.

And eat lots of dim sum. Holy moly, there's a lot of great dim sum in
the Bay area.

If you cross the bay, check out Teance/Celadon over in Albany (actually
part of Berkeley). The tearoom is lovely, the information on their tea
is far-fetched.
http://www.celadontea.com/

Far Leaves Tea is also a lovely little teahouse in Berkeley near the
University.
http://www.farleaves.com/