Hhoope01 makes a good point about what good hotels do. I have been put on higher floors at the Fairview Park Marriott when there are large wedding parties or other groups of boisterous guests at the hotel. The Schaumburg Marriott did the same thing in late June for me.
I consider it poor design to have the ballrooms on the same level as guest rooms. It seems like it will cause problems, especially with loud guests.
I would not be in a good mood if I got stuck with a bunch of loud guests while trying to sleep at 3 am. Frankly, I would make sure that they had no chance to sleep in by disturbing their peace and quiet at 8 am when they are trying to sleep.