- Science Tech And NatureBay Area Linux Users Group (BALUG)Bay Area Linux user group with monthly meetings and mailing lists around Linux and open-source technology.
- Games And TabletopBay Area Mahjong MeetupThe Bay Area Mahjong Meetup is looking for players and hosts in the San Francisco bay area; players of all skill levels are welcome.
- Social And MeetupsBay Area MashersBAM is a non-profit homebrewing club with a membership based in the Northern California East Bay (Oakland, Berkeley area) that was formed in June 1990.
- Games And TabletopBay Area Mustang AssociationClub for vintage and late-model Mustang owners with monthly meetings, cruises, car shows, tech sessions, the Ponies and Snakes show, and charity fundraising. Monthly newsletter The Roundup.
- Science Tech And NatureBay Area Mycological SocietyThe Bay Area Mycological Society (BAMS), established in 2006, is dedicated to the art and science of mushrooms. We hold meetings at UC Berkeley.
- Fitness And WellnessBay Area Older Adults HikesBay Area Older Adults (BAO) was founded by Anne Ferguson in 2008 out of her love for her dear grandparents, who passed away a few years earlier. At BAO, we are inspired by our desire to bring joy to and improve the lives of older adults. BAO is Anne’s humble offering to the older adult community in the name of her grandparents, Jacqueline and Jean–Paul Latil.
- Sports And RecreationBay Area Orienteering ClubBAOC organizes orienteering events throughout the San Francisco Bay Area, offering a mix of physical and mental challenges.
- Games And TabletopBay Area Pinball AssociationOrganizing competitive pinball leagues and tournaments throughout the San Francisco Bay Area.
- Games And TabletopBay Area Poker MeetupMember-hosted poker meetup where members can schedule and host their own games, currently running weekly no-limit hold'em cash games and tournaments.
- Music Dance And PerformanceBay Area Rainbow SymphonyLGBTQ+ and allied orchestra community serving musicians and audiences in the Bay Area.
- Outdoors And AdventureBay Area Ridge Trail CouncilTo plan, promote and sustain a connected hiking, cycling, and equestrian trail on the ridgelines around San Francisco Bay—linking people, parks and open space for today and future generations.
- Science Tech And NatureBay Area SAS Users GroupLocal users group for programmers and users of SAS software in the San Francisco Bay Area.