A participatory community jam session in SoMa — bring your instrument, get a song list in advance, and play with 40 strangers. Tuesday, June 30, 7:30 PM at 1095 Folsom St.

On Tuesday, June 30, roughly 40 people will haul guitar cases and amps into Cobaltix LLC — an IT services company at 1095 Folsom St in SoMa — and spend two hours making music together. That's Music Jam SF, a recurring Meetup series quietly running for more than 30 sessions, rated 4.9 stars across 231 reviews by the 1,693 members who've cycled through it.

The format is participatory, not a show: bring your own instrument. Electric players should bring an amp and a long power cord to reach the outlets. A week before the session, organizer Dan Lupo sends out a song list built around tunes most people already know — the kind of chord progressions you can run through after a few minutes of practice. Lupo leads the main session, then splits into break-out groups for beginners and advanced players. No instrument? There's a spot for singers, or you can swap in on something for a few minutes.

Tuesday, June 30 · 7:30–9:30 PM · Cobaltix LLC, 1095 Folsom St, San Francisco. RSVP required through Meetup (search Music Jam SF). Admission is not listed on the event page — confirm the door policy before you go. Ages and ID requirements not specified.

Transit: Civic Center BART is about a 10-minute walk west on Folsom. Street parking on Folsom is metered but typically available on a Tuesday evening.

The move: Lupo sends the song sheet roughly a week out. That gives you six days to woodshed the chord changes if you're shaky — don't skip it, especially if you're coming in as a beginner. The break-out sessions are where the real learning happens.