Fry's Electronics used to have piano music playing in the stores. Someone said it had been recorded by the wife of one of the executives. It was appropriately vanilla -- nothing offensive, nothing that would wake you up, nothing too too interesting unless you happened to just love music nicely done.

One day I walked past a phone in one of their stores and it was playing the piano music. I asked the salesperson why he was playing that music and he told me he was on hold with another store. The same music was playing and it was synchronized better than every surround receiver's zone 2 ever.