Try your city and/ or county Govt. offices to get the exact answers you need. The type of business your going to be running really thrives with really loud and upbeat music, be careful that the spot or location you choose doesn't thwart this idea. The only reason I'm bringing this up is because I have been to some big metrpolitan cities and the car washes that were booming were the ones with great sound systems.
Good Faith with your business Jeffrey J.
Sincerely, Dan M.
Mar 6, 2011