Well. I went there on a Saturday with some friends. Because of the name, we expected a tunnel, or at least something«hidden», in the same spirit as the warehouse in Shoreditch, but instead we discovered a really small room with a low ceiling. The DJs were at the other end of the«„tunnel“», and even if I liked the fact that they were right in front of us and at the same level, I had the feeling they had a worse night than mine: guys, cheer up ! The only nice thing is the price I guess.