From Wikipedia: "A cockfight is a blood sport between two roosters (cocks), held in a ring called a cockpit. Cockfighting is now illegal throughout all of the United States, Brazil and in most of Europe."
Ernest Hemingway and His World, a biography by Anthony Burgess, includes a photo of Hemingway and his gardener watching a cockfight. The caption quotes Hemingway: "Where else [other than Cuba] can you train cocks and fight them and bet those you believe in and be legal? Some people put the arm on fighting cocks as cruel. But what . . . else does a fighting cock like to do?" (page 94).