“They say that carrying bags is good exercise,” said the poet Jon Cotner to a young woman on the subway, a large shopping bag slung over her shoulder. She looked back at him curiously, then smiled. “Oh yeah?” she said. Five others, including this reporter, had joined Cotner on his expedition, pretending not to watch but taking mental notes on his vocalization, demeanor, bodily gestures, delivery, and success at creating “good vibes.” This was no New Age happening. It was a Spontaneous Society