The dance club and bar unite to create an at-home 2021 celebration. December 30, 2020 PHOTOS COURTESY HOT MASS Normally, the globally recognized, after-hours dance club Hot Mass is an in-person affair. There are no online streams of sets by international DJs; patrons are not allowed to take and share photos from inside the club. Right now, of course, it’s not responsible to have a sweaty, crowded dance party. So, to celebrate New Year’s Eve, the organizers of Hot Mass are, for the first time, inviting the world in — and partnering with one of the city’s most forward-thinking bars to do it.