Dress code?
We're calling this dress code: "Fancy Schmancy" (aka: Anywhere between "Cocktail Attire" and "Black Tie").
Black tie is a lot of pressure, but if you own a tuxedo... by all means, rock it. If you dress happens to be floor length, or any other length, go for it.
But if you wear an all-denim tuxedo, you WILL be asked to leave.