Running a hummingbird café sounds simple enough. Fill the feeders, hang them up, and enjoy the visitors. What nobody tells you is that hummingbirds are demanding little customers. They argue over seating, chase away the competition, and act as though they personally own the place. The service must be prompt, the nectar fresh, and the management invisible. Fortunately, they don’t expect much in the way of conversation, and the entertainment is free.