I used to get invited to these highly secret audio soirées, held in a basement workshop at the end of a dark, garbage-filled alley in Manhattan's Chinatown. There was no street addressonly a wire-glass window in a metal doorand if you didn't know the password (ie, if you weren't carrying some type of audio amplification), you weren't allowed to enter. That said, sometimes nonmembers were allowed to attend, but only when a member needed help carrying monoblocks: There was no parking nearby.