We were first on the 25th floor of the Tower, then on the 26th, and it was pretty noisy up till last night (both floors). I think it's just the luck of the draw there; with so little protection from hallway noise there, if you're on a floor with anyone who likes to talk in the hallway (even at normal conversational tones) or folks who like to go in and out frequently, I think it's going to be a noisy visit.
I'd hate to be there for Mardi Gras, after the Superbowl or even after Thursday's NFL/Saints parade. You expect a party atmosphere at events like that, but I have the feeling the partying will be round-the-clock.