I love all the ritualized behaviour, secret meanings and unexpected taboos - standing up when someone of higher status stands, elaborate rules for serving and eating, tapping the table to thank the server, never refuse a toast from a superior, stuff like that.
Whether it’s about meals or anything else, I’d love to hear about any uncommon politeness standard or similar social behaviour that goes on in your location, culture or restaurant!
In Denmark pedestrians will politely wait for green light even if there’s nobody around.
It makes sense if you’re teaching your child to walk safely, but otherwise it’s just a tradition of doing things proper. It’s so ingrained that police could probably stop a criminal on the run simply by following them until they hit a red light.
Also, never walk on the bicycle lane. That’s taboo.