Cozy room near Olympiapark for 4

We rent a large room in our apartment. In the room there is a 1.4 x 2 m bed and a 1.4 x 2 m floor mattress. So there is enough space for 4 people. The bathrooms and the kitchen are shared, but we are at work during the day and usually at sports in the evening, so the apartment is almost always empty. The washing machine and dishwasher as well as the refrigerator and all other kitchen appliances can be used, as well as the dartboard.