We sublet a room in our apartment. It has a double bed, so ideally it's for two people. Maybe another person can squeaze in. As we are not at home at all you even have to other two rooms for yourself most of the time. Calm area, renovated old building with high ceilings and wooden floor, very centrally located. 2 min to the next bus stop, 5 min to U9. Central station is approx. 10 min away, Tegel Airport about 20 min by bus.