It was sheer luck that JP still had his mask lying around from Halloween, when he'd dressed up in full regalia as the Dread Pirate Roberts. He'd contemplated wearing the whole outfit, considering he'd only worn it to a costume party in the city, but settled on a black suit shirt and black slacks, styling it to slightly resemble the literal outfit, along with the gloves from the costume itself. As open a collar as he could muster without it looking gaudy, in other words. At the last minute, he'd contemplated donning the head covering as well, grabbing it and tossing it on as he made his way down the stairs and toward the gymnasium.
He gave Kitty a drive-by greeting and a hug, complimenting her on getting almost the whole thing done on her own, then wandered away to find himself something cold to drink. When he had a glass in hand, he wandered over to the far wall of the large room, surveying the area, eying everyone's mask choices with amusement.
Did Julio have an octopus on his head? He couldn't quite tell, but that wouldn't have surprised him much.