In order to get a license to do business during the night (which is apparently quite hard), they must forfeit their ability to stay open during the day.
The standard nacht winkel seems to sell (we can't really tell - we haven't been in one yet!) basic necessities and small, packaged food items. Also, perhaps most essential to their business, alcohol and cigarettes.
One person we were talking to said that it was best to avoid these stores because they were so overpriced. He said that everything cost double what it would in the regular stores. He also explained to us that the regular stores were mostly outside of the city center, and that was why we couldn't find any during the day. I have to say, it was pretty frustrating to walk by two or three closed stores before finding one that deigned to stay open during the day.
We were going to go out to a nacht winkel tonight, but it's raining and we have been enjoying the warmth of our room. We've had a nice picnic on the top bunk of our bunk bed, listening to the big drops splatter against the skylight in our little room under the eaves.






