- Outdoors And AdventureKilohana Outrigger Canoe ClubA 501(c)(3) outrigger canoe club founded in 1987 with open division, junior, and keiki (ages 6-12) programs; races OC1/Va'a (Oct-Mar) and OC6 long distance and sprints (Apr-Aug).
- Volunteering And CausesKiwanis Club of NapaKiwanis Club of Napa - Kids Need Kiwanis: weekly luncheon meetings for members and guests, supporting children-focused civic service in Napa.
- Volunteering And CausesKiwanis Club of PetalumaJoin us weekly for our Club Meetings where we have the best speakers - Kiwanis service club supporting Petaluma children and community.
- Volunteering And CausesKiwanis International - Bay Area ClubsInternational service-club network with local Bay Area clubs discoverable through the official club finder.
- Culture And LanguageKorean Center San FranciscoKorean cultural and community center with language, culture, and community programming.
- Music Dance And PerformanceLamorinda Ukulele ClubUkulele fans who have been jamming together on Monday nights since 2014, playing popular songs from the 1920s to the 1980s plus folk, country, and holiday tunes. Also hosts Music in the Park jams.
- Science Tech And CodingLatinas in Tech - Silicon ValleyLatinas in Tech chapter connecting Latina technologists through community, professional development, and events.
- Outdoors And AdventureLatino Outdoors - San Francisco Bay AreaRegional Latino Outdoors community connecting cultura, familia, and outdoor experiences through outings and events.
- Volunteering And CausesLeague of Women Voters of PiedmontThe League of Women Voters is a nonpartisan, grassroots organization working to protect and expand voting rights and ensure everyone is represented in our democracy.
- Volunteering And CausesLeague of Women Voters of the Eden AreaThe League of Women Voters is a nonpartisan political organization encouraging informed and active participation in government.
- Sports Wellness And RecreationLightning Run ClubMission is to build a community that connects and grows physically, mentally, and internally through runs and events across Sonoma County; all paces and backgrounds welcome.
- Volunteering And CausesLions Clubs International - Bay Area ClubsInternational service-club network with local Bay Area clubs discoverable through the official club locator.
- Books And WritingLivermore-Amador Genealogical SocietyGenealogical society (L-AGS) serving the Livermore-Amador Valley with general meetings, monthly e-Bulletins, local records resources, and genealogy education for students.
- Arts And CraftsLivermore Art AssociationThe LAA is a volunteer-run arts organization founded to promote the visual arts (Fine Arts & Crafts) and encourage the artistic development of its members. A 501(c)(3) nonprofit operating the LAA Gallery at Carnegie Park and hosting shows, workshops, and events.
- Arts And CraftsLivermore Valley Camera ClubThe Livermore Valley Camera Club (LVCC) was established in 1958 so that photographers of all levels could meet to share their images, learn from each other, and take part in a range of photo-related activities. Member of the Northern California Council of Camera Clubs (N4C).
- Outdoors And AdventureLos Gatos Bicycle Racing ClubOver 60 years of bicycle racing in Northern California; club supports road, track, MTB and cyclocross racing, club rides, and the Cat's Hill Classic race in Los Gatos.
- Science Tech And CodingLUNAR (Livermore Unit of the National Association of Rocketry)LUNAR is the Livermore Unit of the National Association of Rocketry (NAR section #534), flying model rockets at various times throughout the year. Launches are currently conducted at Snow Ranch (level 3, 15,000 ft altitude limit).
- 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.