Unfortunatelly, we couldn't get into the apartment. Karen told us she left the keys at the bar and I need to ask a bartender for them. But when we found that bar and asked for the keys, the bartender told us he knows nothing about it. When I call to Karen, she tried to solve the problem, but turned out the keys were not at that bar, so we had to find a hotel. Karen apologized a lot about it and I accept it, but our arrival was spoiled. It was rainy, we were tired, but at least the metro in Copenhagen is 24/7.