Rae's adi gallia / attended and wore this with magical help. 100% out of her element, quiet but cordial and kind. basically there to observe, but would have conversed with the Star Wars and Trek folks.
grace le domas / came with Daniel and wore this dress, definitely social and danced a lot
gwen stacy / thanks to her symbiote she wore this dress but with black flats. would have been quite social, talked to anyone she knew, danced like no one was watching, etc. definitely didn't drink much, as she didn't want to make Eddie suffer and deal with buzzed!gwen again like at the Marvel Boxing Day Dinner.
jack ransom / was told he was attending the party, didn't get a choice, but he had to ask for help in obtaining a suit. he would have been incredibly distracted by Mariner, and making sure she didn't start throwing punches, but he'd talk to and flirt with anyone.
persephone / of course was there and thanks to Eros' consultation and some help from Hecate, wore this dress. didn't drink a whole lot but socialized plenty and danced.
peter venkman / came with Katie and wore this combo. talked to anyone, but spent a lot of time around the GB group, and even danced a little.
poseidon / definitely showed up wearing just a plain black suit and white shirt because honestly.. Eros is lucky that his uncle even put on pants for the occasion. drank plenty, danced awkwardly, harassed family and hecate.
shaggy rogers / tried, ok? he honestly fucking tried, but suits aren't his thing. spent most of the night at the food table. also he definitely snuck Scooby in by putting him in a dress - so there's a great dane wandering around, walking on its hind legs pretending to be his date.
steve harrington / Mr. Mom obviously had to chaperone the younger kids in attendance. if you're under 21 and had a drink smacked out of your hands, chances are it was definitely by Steve Harrington. apart from making sure no one got too handsy and whatnot, Steve still managed to enjoy himself, dance some, and hang out with any of the Horror Survival Club folks in attendance.
ted kord / came along with Booster, wore this suit thanks to some magical aid. huge flirt - but like super dorky about it and honestly cares more about making Boost laugh than anyone else.
zatanna / showed up late and on Constantine's arm wearing this dress with the shoes Napoleon got her. would have spent a good amount of time socializing with the DC + Marvel folks and anyone in her growing circle. anyone around her would have found their drinks automatically refilling after they finished. actually not much of a dancer, but wouldn't say no if asked.