Let's clarify one thing: When I refer to 'Musical Showers' in Burger King restaurants, it doesn't mean they will be offering actual showers for their customers. Instead, they will be showering your table with music -- from your own iPod or iPhone.
Debuting in Tokyo, Burger King has installed iPod/iPhone docks in each booth to allow patrons to listen to music without disturbing others. The reason they've dubbed it 'Musical Showers' is due to the fact that the music streams from above. A chandelier-like speaker hangs overhead, containing any sounds within that booth.