We were in Berlin about 5 years ago, and we went to a small jazz bar that was in a cellar.
We cannot remember what is was called or where it was. All I can remember is that it was a bit of difficult place to find. The cab driver dropped us on a dark main road and it looked a rather seedy place. We had to walk around the back and the place looked like a small building site. I know this is not much information, but does anyone have any ideas what the club may have been called.