Summer taped a note to each door on the hall.

Hallowe’en Party!
Come to [flat number] and meet your new neighbor!
Saturday, 8pm BYOB

She’d probably spend the night alone, twitching at every sound, and eat all the snacks out of nervousness, but hell, it was worth a try. And maybe the cute blond guy from a couple doors down would turn up. He’d seemed nice enough.