Reminds me of Berlin parties in S-bahn stations or beneath bridges, usually around Warschauer. Those cannot possibly be legal, but nobody bothers to stop them.
The police here are remarkably tolerant of most victimless crimes, thankfully.
For example, if you see a woman driving in Saudi Arabia, it goes against the law, but is not a crime.
Another example, in the US having a kid drinking wine goes against the law. As a kid in Spain and France I drunk a glass of wine in all meals, like the rest of my family and it is very healthy.
You get used to the rules in your country, but this does not mean that the laws are good. For instance a foreigner going into the US will probably consider barbaric the tradition of circumcising kids when they are born( I thought it myself), but locals rationalize and defend it(like locals in Saudi Arabia do with women driving).
A kid can drive a car but not drink a glass of wine? Utter non sense, but real.