As one who makes a living doing audio for concerts, I will enlighten those who think this is a problem.
COCS does not have a DEFINED noise ordinance. Basically if you call the popo, they have to show up and address the problem. They will then use THEIR judgement to see if you have a valid complaint or not. So it's really a gamble when you call the police as to who "wins". In this situation, with the community respect that Big Event garners, I guess you would lose. If it truly was a NG bar jamming out while cleaning, you would win.
Basically, in this city, noise is noise. I could have called and complained about the Vietnam-era Huey flying circles over my house yesterday, but I didn't. Because it is a special event and will be done in a day. Then you can get along with your life and get back to talking to your 53 cats.....