Walking through the Long Island Railroad concourse, my son was perplexed by the close proximity of three chicken-themed restaurants-Chick-fil-A, Raising Cane's, and Pollo Campero-and by the fact that a shop called Gotham News mainly seemed to sell candy and bottled water. He also wanted to know why some people, as they strolled or waited, drank out of cans in brown paper bags. "Why do they use those bags?" he asked.