- Nature Gardens And FarmsMadrone Audubon SocietyMadrone Audubon Society, established in 1967, is the Sonoma County Chapter of the National Audubon Society. Its bird walks and field trips are free, open to the public and suitable for all levels of interest; the public is welcome at meetings.
- Social And MeetupsMake Friends San JoseGroup for anyone in their 20s, 30s and 40s who wants to build real friendships in San Jose through small in-person meetups - brunches, coffee chats, and dinners - in a relaxed, low-pressure setting.
- Arts And CraftsMaker NexusNonprofit makerspace in Sunnyvale with classes, workshops, practice space, and a large shared facility.
- Science Tech And CodingMarin Amateur Radio SocietyMarin County ham radio club (W6SG) providing public service communications for local races and events, license exams through the Volunteer Examiner program, repeaters, and on-air nets.
Social And MeetupsMarina Plunge ClubMarina Plunge Club is a community built around running, cold plunging, and coffee. Every Sunday morning we meet for a run, a dip in the San Francisco Bay, and social time at a local cafe.
- Sports Wellness And RecreationMarin Aquatic MastersWelcomes swimmers of all abilities who want a coached workout in a fun and supportive environment; USMS certified coaches; also offers free beginner lessons, a Bridge to Masters program, and Beginning Masters program.
- Sports Wellness And RecreationMarina Run ClubMarina Run Club is a community of active and friendly 20-somethings. They offer both paid and free options and are an inclusive running community.
- Nature Gardens And FarmsMarin Audubon SocietyMarin birding and conservation organization with field trips and speaker programs.
- Sports Wellness And RecreationMarin Bocce FederationCommunity bocce organization with leagues, tournaments, and a dedicated Marin bocce facility.
- Books And WritingMarin Book Club (25 - 40 y.o.)Let's get together to talk about books! Whether you're already an avid reader or hoping to kick off a new reading habit, you are welcome.
- Sports Wellness And RecreationMarin Coed Soccer LeagueRecreational adult coed 11v11 soccer league with ten teams playing Saturdays in Spring and Fall round-robin seasons; open to women 18+ and men 30+; no standings kept and Good Sportsmanship Awards given each season.
- Books And WritingMarin County Genealogical SocietyA vibrant community of family historians who enable individuals to discover, preserve, and share their family histories through education, research, and community engagement. Special interest groups include DNA, book club, and writing groups.
- Arts And CraftsMarin Golden ThreadsMarin Golden Threads is a chapter of the Embroiderers' Guild of America, a haven where devoted needlework enthusiasts unite, with monthly programs, workshops, and lectures.
- Arts And CraftsMarin Photography ClubWe are a dynamic group of photographers who come together to learn, grow, and share our love of photography. Whether you’re just starting out or are an experienced photographer, our club offers a welcoming environment filled with learning opportunities, creative challenges, and genuine friendships.
- Sports Wellness And RecreationMarin Pickleball LeagueOffers weekly clinics, weekly round robins, and monthly flexible-schedule league play for all levels at public courts around Marin County; partners matched on request. Run by Teresa Toepel and Alyson Aiello.
- Sports Wellness And RecreationMarin Soccer LeagueThe original North Bay men's soccer league' - mission is to grow a league rooted in healthy competition and camaraderie where people of different ages, origins, and skill levels enjoy weekend matches and midweek kickarounds.
- Outdoors And AdventureMariposa Hunters Point Yacht ClubThe Mariposa Hunters Point Yacht Club (MHPYC), established in 1932, is a non-profit, membership club dedicated to sailing and service to the greater San Francisco Bay Area community. The club sponsors recreational, educational, and charitable activities.
- Sports Wellness And RecreationMartinez Golf AssociationA men's and women's traveling golf club founded in 1961; a 501(c)(7) and NCGA associate club playing monthly tournaments at SF Bay Area courses, NCGA qualifier events, and an annual out-of-area golf excursion.
- Nature Gardens And FarmsMidori Bonsai ClubSince 1961, one of California's oldest and most vibrant bonsai clubs. Midori Bonsai hosts twice-monthly bonsai meetings, workshops, and events in the San Jose area for enthusiasts of all levels.
- Sports Wellness And RecreationMid-Peninsula Running ClubA free running club that serves the peninsula area and is open to runners of all ages and speeds. The Mid-Peninsula Running Club has been around since 1988 serving runners in San Mateo County.
- Nature Gardens And FarmsMilo Baker Chapter, California Native Plant SocietyMilo Baker Chapter of the California Native Plant Society, named after the famous Santa Rosa botanist Milo Samuel Baker, located in Sonoma County, protecting native plants through science, education, stewardship, gardening, and advocacy.
- Science Tech And CodingMLOps Community San FranciscoLocal San Francisco chapter/events for the MLOps community, focused on real-world ML systems and production ML practices.
- Social And MeetupsModernistModernist is a San Francisco based private social and venture club founded in 2015. It is a curated member community with a mission to build an amazing life-long community in San Francisco and around the world.
- Food And DrinkMOSAMOSA is a creative culinary experiential events studio producing elevated social dining experiences to serve unforgettable gastronomic affairs, including an invite-only San Francisco supper club.
- Science Tech And CodingMount Diablo Amateur Radio ClubEast Bay amateur radio club for ham-radio operators, public-service communications, and local radio community.