This sort of place is exactly why I love to use Airbnb. Super unique location in the back of a small language school (I'm pretty sure the room is an unused dorm) that is right next to one of the most hopping streets in Berlin as well as many restaurants. They have a partner hotel with a great swimming pool, ping pong on the campus (wouldn't be college without ping pong) and if you hang out outside (there's wifi everywhere) you may get some free language lessons!