Index of rationalist groups in the Bay Area June 2025 — LessWrong
blogAuthors
Lucie Philippon·Czynski·Screwtape
Credibility Rating
3/5
Good(3)Good quality. Reputable source with community review or editorial standards, but less rigorous than peer-reviewed venues.
Rating inherited from publication venue: LessWrong
This is a community directory rather than a technical or policy resource; it is most relevant for individuals seeking to connect with the Bay Area rationalist or AI safety community in person.
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14
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lesswrong
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List of LinksThe SF Bay AreaCommunity
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Importance: 22/100blog postreference
Summary
A collaboratively maintained directory of rationalist, EA, and AI safety groups in the San Francisco Bay Area, created to address the fragmentation of the community after many groups became inactive and communication moved to private channels. It catalogs local meetup groups, housing communities, EA organizations, and AI safety initiatives, and is mirrored at BayRationality.com.
Key Points
- •Addresses the 'entry problem' of the Bay Area rationalist community where listed groups were dead and communication moved to private Discord/Slack channels.
- •Catalogs local meetup groups (Taco Tuesday, Thursday Dinners, SF LessWrong Meetup), housing communities, EA orgs, and AI safety initiatives.
- •Maintained collaboratively and mirrored at BayRationality.com for up-to-date, centralized community access.
- •Includes communication hubs: Bay Area Rationalists Discord and BayAreaLessWrong Google Group.
- •Useful onboarding resource for newcomers to the Bay Area rationalist and AI safety community ecosystem.
Cited by 1 page
| Page | Type | Quality |
|---|---|---|
| Gratified | Organization | 25.0 |
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# Index of rationalist groups in the Bay Area June 2025
By Lucie Philippon, Czynski, Screwtape
Published: 2024-07-26
\[Last update: 2025-06-07\]
The Bay Area rationalist community has an entry problem! Lots of listed groups are dead, the last centralized index disappeared, communication moved to private discord and slacks. This is bad, so we're making a new index, hopefully up to date and as complete as we can!
This is now being mirrored at [BayRationality.com](http://www.bayrationality.com/), which will hopefully get prettier formatting over time.
Communication
=============
Discord: Bay Area Rationalists: [https://discord.gg/EpG4xUVKtf](https://discord.gg/EpG4xUVKtf)
Email Group: BayAreaLessWrong: [https://groups.google.com/g/bayarealesswrong](https://groups.google.com/g/bayarealesswrong)
Local Meetup Groups
===================
Taco Tuesday: by Austin Chen, founder emeritus of Manifold. Check [his Manifold questions page](https://manifold.markets/Austin?tab=questions) for the next date!
Thursday Dinners in Berkeley: Advertised on the Discord server and Google group, alternating between a few restaurants on the northwest side of UC campus. Has an associated Signal group chat.
[Lighthaven Sequences Reading Group](https://www.lesswrong.com/groups/LK6GNnKp8PDCkqcxx): Currently Tuesday, hosted by the Lighthaven team. They advertise on LessWrong.
[San Francisco LessWrong Meetup](https://www.lesswrong.com/groups/qQkgmEeEreY6gjd7o): Meets every first Saturday in San Francisco, hosted by [Nate](https://www.lesswrong.com/users/nate-sternberg) and [Andrew](https://www.lesswrong.com/users/andrew-gaul).
Thai Temple Brunch, on irregular Sundays in South Berkeley. Advertised on Discord server and in some Signal groups.
[Bay Area ACX Meetups](https://www.facebook.com/groups/566160007909175): For the ACX everywhere meetups twice per year, and some other sporadic events.
The [Bayesian Choir](https://discord.gg/rfPYGCV): Usually meets every other Sunday near North Oakland, and more often during the fall to rehearse for the Solstice. Choir Director and primary organizer is Blake Jones, and coordination happens on the linked Discord server.
Official policy on new singers is "Anyone who can pitch-match is welcome.", though joining tends to be suspended during the rehearsals for Solstice. See more detail on the [introduction doc](https://docs.google.com/document/d/1Rwmwx6lOhzWgWPtrX3EWMXmJqNpQpHtqRYMbicDTGj8/edit).
South Bay
---------
David Friedman hosts irregular SSC/ACX meetups at his home in San Jose, tracked on [a page of his personal website](http://www.daviddfriedman.com/SSC%20Meetups%20announcement.html) and typically also announced on the email group and Discord server. They are weekend events, starting early afternoon and running through dinner (provided) and into the evening. RSVPs are preferred for meal planning purposes.
Housing
=======
To find spots in group houses, temporary or long term, you can use the [Bay Area EA/Rationality Hou
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