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/RSVP, that's fine, you are welcome to show up just because you're reading this! Here is all the info you need:
Place: Restaurant Dubliner, Kaivopiha, Helsinki.
Time: Wednesday 2019-12-11, 18:00 onwards
How to find us: We will be in the private room named Guinness Lounge, find that room and just come in. (The room is prominently labeled, or you can ask the staff where it is).