See https://www.meetup.com/Helsinki-Slate-Star-Codex-Readers-Meetup/ for more information.
If you don't want to bother with meetup.com registration, that's fine, you are welcome to show up just because you're reading this post! Here is all the info you need:
Place: Restaurant Dubliner, Kaivopiha, Helsinki (note that the map pin is slightly wrong, click here for the exact location)
Time: Tuesday 29.10.2019, 18:00 onwards
How to recognize the group: We will be in the area called "Bushmills Corner". There will be a small wooden parrot at the table