The cavern club
This is a claustrophobic, bad smell and noisy place in Liverpool. They charge 1 pound as entrance fee. i do not recommed it. I think that I have only been in a place worst than this: the preservation hall (related to jazz) in New orleans. There, they try to cheat you, even more than here!
This place seems to be famous due to a quite unknown local group. Nothing to do with the very famous Berlin Zodiak Club where very famous groups played, such as Tangerine Dream, Ashra, Klaus Schulze.