I've seen TV advertisements that used different car horns to play a tune.

Imagine the parking lot (or car park) melodeon. We'd need to know what notes our horns played, and park them in appropriate sections. We'd need a conductor.

I'd suggest we run right out and discover what notes our car horns play, come back and post the notes. Someone could find a tune that could be adapted to those notes. The next big event, we could all play a tune. Gives new meaning to the term "parking lot jam."

Maybe we could work up "Taps" for Naemanson's wedding?