Helsinki Rationalish is an informal group for people interested in Less Wrong, SlateStarCodex, and/or some parts of Effective Altruism.
We also have an active telegram chat; message us with a brief introduction or poke us at an event to join.
You can also follow our calendar from here: https://calendar.google.com/calendar?cid=c3NjaGVsc2lua2ltZWV0dXBAZ21haWwuY29t