There is one double bed in the apartment as well as a double sofa bed and so there is space for 4 people.
The apartment is split over two levels. On the ground floor, there is one large room that's divided in two by a low partition - on one side is a sleeping area (with a double bed) and on the other is the living area (with sofa bed & TV). The partition is easy to move and so the room can be rearranged as you see fit. Upstairs, there is a kitchen, a bathroom and a dining room/study. In the past people have used the dining room as a second sleeping area - we have an inflatable mattress that you can borrow.