- Science Tech And CodingPiedmont Garden ClubPiedmont Garden Club members meet monthly to learn about garden-related topics including garden and floral design, garden photography, horticulture and environmental conservation.
- Culture And LanguagePiedmont Historical SocietyThe purpose of the Piedmont Historical Society is to encourage interest and increase knowledge of Piedmont's unique local history
- Social And MeetupsPiedmont Neighbors' and Newcomers' ClubThe Piedmont Neighbors' and Newcomers' Club (PNNC) would like to officially welcome you to the neighborhood!
- Social And MeetupsPinole Senior CenterThe Pinole Senior Center provides social, educational, recreational, health, nutritional, and consumer services and activities to more than 1,000 yearly participants.
- Science Tech And CodingPlatform Engineers SF & Bay AreaPlatform engineering community for internal tooling, platform teams, internal developer platforms, DevOps, and SRE topics.
- Sports Wellness And RecreationPlay in The BayPlay in The Bay Adult Leagues offering Basketball, Bocce, Bowling, Cornhole, Dodgeball, Football, Kickball, Softball, Spikeball, Volleyball.
- Arts And CraftsPleasanton Art LeagueNonprofit charitable organization serving artists in the Tri-Valley area, with general meetings, workshops, exhibits, an art circuit, and scholarships. Holds joint LAA/PAL general meetings with the Livermore Art Association.
- Music Dance And PerformancePleasanton Community Concert BandVolunteer community concert band performing free concerts around the Tri-Valley, including farmers' markets and the July 4 celebration.
- Social And MeetupsPleasanton Mothers Club (PMC)Social nonprofit for Tri-Valley moms with playgroups, moms' nights out, and an annual Mother's Day Brunch celebrating members.
- Music Dance And PerformancePoint Richmond MusicPoint Richmond Music (PRM) provides free outdoor summer concerts as a way to build community through the unifying language of music.
- Outdoors And AdventurePoint San Pablo Yacht ClubPoint San Pablo Yacht Club (PSPYC) is a private, non-profit yacht club.
- Games And TabletopPorsche Club of America - Golden Gate RegionPCA Golden Gate Region, celebrating its 65th anniversary, offers the best Porsche experience California has to offer: social events, motoring trips, autocross, time trials, high performance driver education, and club racing.
- Science Tech And CodingPostgreSQL User Groups - Bay AreaBay Area PostgreSQL user-group coverage, consolidated to avoid separate chapter rows.
- Books And WritingPride & Petals: Sapphic Romance Book ClubJoin our free sapphic romance book club - snacks, chats, and community for LGBTQ+ romance lovers!
- Business And CareerProductTank SFVolunteer-organized product community for product managers, designers, developers, and other product people.
- Books And WritingProject Literacy Book ClubFree book discussion group for adults who are already part of Project Literacy or who are interested in joining.
- Volunteering And CausesQueer Native Plant Nursery Program (Save The Bay)This volunteer program is an affinity space for folks that identify as LGBTQ+ and is led by staff that identify as Queer.
- Sports Wellness And RecreationQueer Run SFA weekly meet up for queer runners of all skill levels 👟✨
- Outdoors And AdventureRainbow SierransSierra Club activities section for LGBTQ+ people and allies, focused on outings and conservation.
- Science Tech And CodingReact Native San FranciscoDeveloper community for React Native talks, discussions, and hack sessions.
- Books And WritingReading on the Avenue Book ClubYoga for a Healthy Mind and Body. Discover a soothing practice designed for all bodies and all levels. Gentle Yoga invites you to relax, restore, and feel better from the inside out.
- Sports Wellness And RecreationRedwood BowmenRedwood Bowmen Archery Club maintains a 35-acre archery range in the hills of Oakland, California.
- Music Dance And PerformanceRedwood Rainbows Square Dance ClubSquare dance club dancing at Wischemann Hall in Sebastopol, offering learn-to-square-dance classes, club dances, and a Bay Area dance calendar.
- Music Dance And PerformanceRedwood SymphonyRedwood Symphony is an all-volunteer orchestra dedicated to the performance of ambitious, contemporary repertoire as well as the great orchestral classics. Now in its 41st season (2025-26).
- Sports Wellness And RecreationRenegade RunningRenegade exists to radically imagine a collective future through movement and running on our own terms.