Pacific Masters: Central organization for over 100 masters swimming clubs in Northern California and Nevada. Must have a membership through them to be a part of a masters club/team. Comprehensive list of clubs can be found here.
USF Masters: Located in the Koret Center at USF. Contact coach Valeriy (415) 422-2597 or Cathy Huang 415-422-6247. $15 drop-in fee. Call first. Must have masters card.
Fog City Masters: Located at Herbst Natatorium at St. Ignatius High School in the Sunset. Contact Diane Davis at 415-682-5044. $6 drop-in fee. Must have masters card.
SF Tsunami Masters: Located at Hamilton Pool. Email firstname.lastname@example.org for more details. First two swims free, then must join to continue. Must have masters card.
Club One Masters: Located at Club One Facilities in the bay area. Contact Nick.Lee@clubone.com for more information. Must be Club One Member.
UCSF Masters: Located at UCSF Bakar Fitness Center in Mission Bay. Must be UCSF Fitness Center member. Must have Masters Card. Nominal additional monthly fee for unlimited masters practices.