We had only a few "sheds" in our small town on the San Francisco Peninsula, but restaurants build a LOT of wooden platforms on the parking spots (with city blessing). They are still there. In fact, one was torn out last week and replaced with new lumber. They are very popular for outdoor dining. The few "sheds" were mainly tent-like structures with clear vinyl windows. Those are all gone now.
My son and I ate dinner downtown a week ago Monday night and we sat outdoors one street over from Main St. It was dead quiet on the street which was really nice. Only one car passed by every few minutes.
I can imagine the "sheds" in NYC must be an awful, chaotic mess, but the NYC "dining igloos" were even worse...
