We join regular event "Chatting Thursday" in BDSM Atelier in Prague 10 Strašnice.
There is a non-smoking restaurant part and a comfortable seating area. There is also garden seating, which is intended for smokers. You can meet new people or chat with old friends.

Entrance fee: 100 CZK/person
https://www.bdsmklub.cz/?event=482

How it works (in Czech)
https://www.bdsmklub.cz/?faq