15 Association
Gay male BDSM and social group
(415) 673-0452
http://www.the15association.org

ALT.com
BDSM and alternative online personals
http://www.alt.com

Black Thorn
Black Thorn is a dungeon located in the Oakland, CA
http://black-thorn.org/

Bondage a Go-Go
Wednesday night fetish dance party – no sex
http://www.bondage-a-go-go.com

Bondage.com
BDSM online personals and matchmaking
http://www.bondage.com

Cleo Dubois Academy of SM Arts
Offers classes for individuals and couples in skills with BDSM participants and their accessories.
http://www.sm-arts.com/

Dark Garden
Unique and custom corsetry
(877) 431-7684
http://www.darkgarden.com

Deviant Desires: Incredibly Strange Sex by Katharine Gates, published by Juno Books [Buy]
Author Katharine Gates explores all sorts of special sexual interests in photos and text.
ISBN 1890451037

Exiles
Social/educational BDSM group for women
415-938-7376
http://www.theexiles.org

Fetlife
Social Network for the BDSM, Fetish & Kinky Community
https://fetlife.com/

Fetish Sex: An Erotic Guide for Couples by Violet Blue and Thomas Roche, published by Daedalus Publishing Company [Buy]
A guide for understanding and making the most of your–or your lover’s–fetish, to achieve a happy, healthy sex life.
ISBN 1881943232

Foot Parties
Foot Fetish Parties (all male)
http://www.footfriends.com

Foot Parties (Women for Men)
Foot fetish parties, women for men
http://www.footnight.com

Foot Worship
Fetish shoe store
1214 Sutter St., SF
(415) 921-3668

Leather Etc.
Sells leather clothing, BDSM toys, and fetish gear.
1201 Folsom Street, San Francisco, CA 94103
(415) 864-7558
http://leatheretc.com/

Max Fisch
Message boards and directory for professional dommes
http://maxfisch.com/

National Coalition for Sexual Freedom
National advocacy on sex issues, primarily focused on the rights of consenting adults in the SM-leather-fetish, swing, and polyamory communities, who often face discrimination because of their sexual expression.
http://www.ncsfreedom.org/

On the Safe Edge: A Manual for SM Play by Trevor Jacques, Michael Hamilton, Dr. Dale [Buy]
Reference book and introduction for S&M (sadism/masochism), with great information about maintaining psychological safety and physical safety.
ISBN 1895857058

Rose City Discussion Club
Portland, OR-based support group for the pansexual BDSM, fetish, and alternative sexuality community.
http://www.rcdc.org/

San Francisco Citadel
Venue for classes and discussion groups
http://www.sfcitadel.org

San Francisco Leather
For events, see the Leather Calendar section.
http://www.sanfranciscoleather.com/

Service of Mankind Church (SMC)
Goddess worship, female dominant/male submissive social group
(510) 232-1369
http://www.darkside-goddess.org

Society of Janus
BDSM education, support, social group, and classes (also maintains a community event calendar on their website)
(415) 292-3222
http://www.soj.org

Stampede
SF-based human animal roleplay society
http://www.the-stampede.com