- Science Tech And NatureMarin Audubon SocietyMarin birding and conservation organization with field trips and speaker programs.
- Sports 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 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.
- 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 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 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 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.
- Science Tech And NatureMidori 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.
- Fitness And WellnessMid-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.