Some Gramercy Park residents were surprised on Sunday evening when handwritten notes were slid under their doors, urging them to take action. The cause for the outrage? A certain fashion party scheduled for tonight.

The inevitable loud music, the late end time (3 a.m.), and more notably, the date, have neighbors frothing at the mouth. So which soiree has everyone's starched panties in a twist? Marc Jacobs, of course.