How well do you know your own city? I mean really KNOW. I have been passing and spending time on a square in Copenhagen for the past 23 years, and yet there is a place, that I have never seen despite it has been in the same spot for more than 40 years. Sporvejen (the tram) - they have out doors serving in the summer period otherwise it is a small, nostalgic place in the wintertime.
The interior is the actual interior of a former Copenhagen tram (they were discontinued in 1972) and windows are replaced with nostalgic pictures of trams around in the city of Copenhagen) - the tables have 2-4 seats and the food served are burgers and omelettes. The atmosphere resembles an American Diner.
A friend introduced me to this place and it is not the last time, that I have eaten there. Their burgers are yummy, and a bit larger in size than the ones served at Shake Shack in the US but still a size you can actually finish and leaves you full in a good way. The waiters have a smile and pays good attention to their eating guests and you can sense that they like working there. Prices - eating out in Denmark is expensive, but it is very reasonable at Sporvejen.