In my case, it was a hackerspace. It has windows to the street, so if the police would have happened to go along the street and see that, they could have intervened.

There was one report in the newspapers where they fined a small card playing organization due to that, but of course they were a group of people.

In my country, there was a mask mandate in all enclosed areas except private residences, even when you were the only person there.

That article is nearly a month old.