I have to admit that I gained great satisfaction at one time by playing a certain CD (the one they asked me to play on) over and over in my office on the PC speakers, and only just loud enough to be heard throughout the building - OK, so it's a small building with about 6 workers in it all the time and others wandering through - First couple of times through, people made "smart" comments. Within about four/five repeats, people were humming along to some tracks. By the end of the second day, I got a (very) few comments, and everybody knew the tunes. After the fourth consecutive day, people generally were ignoring it. Now either we struck the Muzak formula (which heaven forbid!) or there's a lesson there for the psychologists among us.