What should I wear/dress code at Highbar NYC?

I'm going to Highbar in NYC tonight have any of you ever been there? It seems a little upscale, do people usually wear jeans? I was thinking of wearing a dress but it's only gonna be 60degrees tonight, and the club is on a rooftop, so I don't know if a dress is a good idea, it might be too cold. But I read that the rooftop is heated, but do you think they'd have the heat on this time of year?