Anyone have any good ideas for opening HB's or sets on halloween.
i think the "i love your costume i just saw another girl wearing the same exact thing" might work nicely.
any other ideas?

Whatever you do, always say something about her costume! Doing that shows you're really creative and way unique (I hope the sarcasm is obvious). Personally, I'd probably say something stupid about Christmas (so you think Santa will bring you presents this year?) or Easter (I'm on an egg hunt with my friends, need some help). Problem is that no one will get it later in the evening. But your costume opener will probably even work at that point, since she'll be too drunk to remember that she's already heard it a hundred times.

Or you could just hand out candy, just no "sweets for someone sweet" kinda shit please.

or just ignore the costume and use a typical opener you would any other time. You can always slip in the "A lot of ppl are wearing that this year" line as a neg. Shouldnt be hard since most girls will either be playboy bunnies or hoes