The perfect place to be with a group of friends for a little trip ! We were 5 friends, we rent a bedroom for 6 persons (we payed the sixth bed not to have a sixth person we don't know with us). And we had a bathroom just for us in our bedroom.
There's the WIFI, a bar always available with a billiard, and a public transport station very close to the hostel.
Well, there's is a really nice and informative team to host you in Singer Hostel. We loved so much that place that we plan to come back in Berlin renting Singer Hostel again. It's cheap and cumfortable. Don't hesitate !