Rosalie Hale loved human Halloween parties.
Okay, she wasn't going to say she liked the noise, the drunken touching, the drugs, the crap that happened, and the cheesy costumes people wore to try to be sexy or whatever. But she loved the aesthetics.
A late-night party, where monsters like her kind went out to hunt and have fun at a Halloween party that would go on from midnight until 3-4 in the morning.
And, of course, the Cullens had been invited to such a party. And of course they always went when they were invited. It was the perfect opportunity for some fun that wouldn't arouse suspicion, and where they could take advantage of being vampires to have more fun freely.
And that was what some of the Cullens like Alice, Jasper, and Emmet were trying to do now. Edward was probably being a parasite, stalking Bella instead of trying to have fun, and she was leaning against a wall, watching and hating the fact that she couldn't even drink a drop of alcohol at a damn party made for drinking alcohol.
She wanted something to occupy herself, something or someone. And she searched with her eyes for anything that caught her attention.