Chicago seemed empty on Friday. It was due to social distancing, but thanks to the rain and the gloomy day, the void felt greater. Yet there was still a crowd of cars and SUVs lined up along Halsted Street in front of Alinea. It was an unusual scene outside one of the world’s most acclaimed restaurants — like school was out, with parents queuing up to wait for their children. One Alinea worker, standing outside in a poncho, laughed at