WeWork’s Financial District location advertises building amenities such as “fruit water”, but here’s something the co-working company hasn’t publicized yet: In the basement of the former Goldman Sachs building at 85 Broad is a new club called the Mailroom. The place was popping last night as James Murphy of LCD Soundsystem did a set under the disco balls. The new space, from the folks behind Montauk’s Surf Lodge, has a distinctly midcentury modern vibe, with Noguchi-style lamps, tulip tables, and handsome wood paneling. In the bordello lighting, I couldn’t tell whether they were original Saarinen tables or reproductions, but with bottles going for upwards to $600, they better be originals. Amidst the refinery, there are nods to the grit of old New York, like framed skateboarding photos and posters for Andy Warhol’s Exploding Plastic Inevitable show. The Mailroom shares space with the building’s actual mailroom, and the decor plays this up with old-school post-office boxes.