Dean & OTA
There was no way in hell Dean was going anywhere near a Halloween party. He wasn't stupid. The night itself might be a few weeks away but the whole season was supernaturally dangerous and he wasn't so much as looking that way. Even if he'd sort of gone out with the chick running the show. Even if he was thinking about maybe giving her a call again.
He was at home in the club, with his brother working there and his roommate owning the place, so he just settled in his usual spot at the bar and got himself a drink to nurse, ready to spend an evening firmly ignoring the fact that some idiot could be taking their costume a little too far and summoning something right that moment.