If you happened to wander into this party, lured from the street by the muffled sound of electronic dance music bumping off the walls of the 2,000-square-foot space, you might have thought it was 2019 again, when the bottom halves of our faces were left unadorned by swaths of fabric and sharing something you smoke, something you drink, or someone you sleep with didn’t put your life in danger. On the teeny back patio of a vacant industrial warehouse on the border of Bushwick and Williamsburg, at a covert party named, fittingly, “Dirty Dark Underground,” I can find only one person out of a couple dozen revelers who appears to even own a mask, though his is currently dangling under his chin. It’s 2 a.m., or, per the guy sitting next to me, “the hour where nothing is awkward,” on a Friday night less than two weeks before the presidential election and three weeks before COVID-19 positivity rates would creep back toward 3 percent in New York, prompting a series of new lockdown measures - a night and moment that, in retrospect, would be the twilight of New York’s pandemic reprieve. A rooftop party in Bushwick on September 26.