When you enter the building you see a white hall with high walls and old-fashioned gilded lamps. There is a small bar selling coffee, pretzels and champagne. In front of the counter, you see a few fake marble cocktail tables where people dressed in various shades of grey, black and beige are talking in small groups of three or four. You can approach them to start a conversation.
As you keep looking around, you find the cloakroom on your right. On the wall next to the cloakroom, there is a door. It seems as if it was intended to be a secret door, but because of the cracks in the wall, it’s pretty obvious. No one is watching you so
you can try to enter the door if you want to.

Or you can just go up the stairs that are on your left.