San Francisco Tenants Union - http://www.sftu.org/
Since 1971, the SF Tenants Union has been fighting for the rights of tenants and for the preservation of affordable housing in San Francisco. From the struggle for rent control in the 1970s to 1998's Proposition G (to end the abuses of OMI evictions), the Tenants Union has been the city's leading advocate for tenants. For both members and non-members, the SFTU operates a drop in counseling clinic at 558 Capp Street (in the Mission District - cross street is 21st Street; Capp runs parallel to Mission St and is one block east of Mission). Counseling hours are available by calling 282-6622.
The SF Tenants Union offers invaluable counseling to those facing evictions, unlawful detainers and tenant related issues.