Music in the office came from a small black thing that played CDs and cassettes. It had a radio, too, but we weren't allowed to listen to it.
Official music policy decreed that whomever put a tape or CD on was allowed to listen to it. This was fine except that Stu was pathologically incapable of sitting in a silent room. Stu sat nearest the black thing. Stu was always able to get to the black thing before anyone else.
De facto music policy was that we listened to whatever Stu wanted.
This was usually fine except on the day when Stu decided to listen to Metal Machine Music.