Nostalgia: Right now, it’s the lifeline New Yorkers are desperately clinging to, just to get us through some tough times. Look no further than Chelsea newcomer Retroclubnyc, an old-school dance club geared toward people in their thirties and forties rather than the usual crowd of twentysomethings. The lack of blatant signage outside the bar evokes a speakeasy, with only a bouncer to indicate you’ve arrived. Inside, four bartenders work a long, black bar lit with lamps made from booze decanters.