You've got to understand, my "knowledge" about what goes on at all-girl parties is gleaned from 34 years of watching naughty cheerleader movies. My natural assumption is that you gals must have done some underwear dancing or, at the very least, had a lingerie pillow fight.
On a separate note, while dancing was disallowed, surely Susan allowed Helen to do the George Jefferson walk in honor of the late, great Weezie, right?