Astral Codex Ten Meetup

The official bi-annual London meetup for fans of the popular blog [Astral Codex Ten](https://astralcodexten.substack.com/) (formerly [Slate Star Codex](https://slatestarcodex.com/)) by American psychiatrist [Scott Alexander](https://twitter.com/slatestarcodex). **Please register to attend: [https://luma.com/ACX-London-Sep-2025](https://luma.com/ACX-London-Sep-2025)** ​The meetup will be held at [Newspeak House](https://newspeak.house/) and is organised by [Edward Saperia](https://bit.ly/edsaperia). There will be light refreshments and an ongoing [unconference](https://www.improbable.co.uk/open-space). Donations go to catering and venue costs. ​To be notified of future meetups, you should subscribe to [ACX London](https://groups.google.com/g/acxlondon), and you might also want to check out [London Rationalish](https://www.lesswrong.com/groups/L2rpiNbg7YcAnqD3S), [LessWrong Events](https://www.lesswrong.com/community), and [Effective Altruism UK](https://effectivealtruism.uk/events).