Ah, spring: birds chirping, flowers blooming and smokers smoking. Fashion’s favorite habit is in full force at New York’s rooftop bars, thanks to the convenient loophole to the city’s smoking ban. Just witness the events around Cinco de Mayo this year. “I love this. I hate having to smoke on the sidewalk,” an editor said recently at the Hotel Americano rooftop, where, behind her, a pack of models stood, each with a Marlboro in hand.