I don't have specific information if they have a marriage support group, but all these churches are pro-marriage, and will support your DB efforts.
East Bay: First Presbyterian, Berkley
Peninsula: Grace Presbyterian, Pao Alto; Menlo Park Presbyterian
North Bay: Grace Church, Morin
SFO: Golden Gate Community Church; St. Benedict Roman Catholic Church; Our Lady of Fatima Church
Look them up on Google. Call and ask, speaking to a pastor/priest and talk about your situation and you are looking for people to support you in your DB efforts.
