Debra & others,
I answered "no" to your poll. Even though we have large "old style 70s 80s?" powerfully loud waterproof Talk-A-Phone-2-way audio Horns in the each bay. An audio expert might share his or her opinion on the quality ... not sure myself. I know voice communication is not too horrible. They tend to be used at large landscape nursery-garden centers.
KB-ML-10
talkaphone.com
About a city block from us is Scotty's Drive In ... a very similar format as McDonald's. They play very loud "tends to be nostalgic previous top oldy but still really good records" music while they are open. I am surprised that I rarely see any people breaking out into a dance by their outdoor picnic tables or people walking on the sidewalk by their large corner lot. Unless the dogs they were walking were dancing a bit ... I need to pay closer attention! The homeless single & groups walking tend to be less self conscience so ... there again I probably should pay attention better!
In our PLC driven dog wash we have a device that plays "loud ice cream truck" music while we have our bypass key in so we do not forget to take it out or leave the key switch in the bypass position. If there are people in the other dog wash room-stall ... we always check & ask to see if their dog might get "skiddish" if they hear "loud ice cream truck" music. It is usually just on for a minute or two ... just for us to "power rinse & mint smell" clean up of the accessible available room-stall.