We meet about monthly to read the sequences posts. We focus on extracting insights from the LessWrong sequences and applying them to improve our rationality.
We read together and then discuss, no preparation necessary. Each session is independent, as the blog posts are independent, any time is a great time to join.
This group is mainly coordinated via meetup.com: https://www.meetup.com/de-DE/LessWrong-Rationality-Meetup-Berlin/