Please don't wear Curve. Please.
You have a number of options that would work well there though.. You'll get replies like "Oh, you smell nice," from things like AdG or Fierce... but go for something like Rochas Man and one of those delicious rushers might just lean in closer to say hi to courteous brother.
I'd go for something that wears close since those houses are just that.. houses. You'll end up closer to people than you think at those things, and everyone else will be spraying on their colognes, so go a little different like gourmand, and someone might just take note.
What house is she rushing/pledging? What school?