Do not cross on a red light, even with no car in sight. Do bring your own bags, greet the room when you walk into a small shop, and respect the Sunday quiet. The unwritten rules that earn a side-eye when you miss them, laid out kindly so you never do.

It is not a paper cup on the way to somewhere else. What to ask for so you do not end up with a single shot of espresso by mistake, why nobody is rushing you out the door, and how Kaffee und Kuchen became my favorite part of the afternoon here.

Less than you leave at home, but never nothing. How much to round up, why you say the total out loud when you pay instead of leaving coins on the table, and the small ritual that quietly marks you as someone who knows how it works here.