You will not stay alone. The San Francisco Polyamorous Community community is already waiting.

This chat is deliberately limited to Polyamorous Community. Expect book-club around The Ethical Slut, More Than Two frequently, with Hayes Valley and Mission District as the go-to spots.
Group vibe
Deliberately limited, high-signal, worth the narrower lens.
Example members. Real archetypes drawn from the people who already meet up here.
From Berlin
Married, two additional partners
From Lisbon
Triad living together
From New York
Solo-poly, multiple partners worldwide
From Amsterdam
Ethical non-monogamy advocate, teaches workshops
One number to sign up. Your group is already waiting on the other side.
Join Polyamorous Community