Allright, i got it now... the thing in this place is that it is owned by a pair of identical twin brothers -more or less involved in every old-school metal activity known in Paris, particularly Maiden fan conventions-, of which one isn't very nice , while the other is the good one. I know it is cliché to solve a case with the evil twin excuse, and that it could be a gag taken from spinal tap, but I swear it's true!!