Joel McHale is learning to fight. The host of “The Soup” and “Community” star is in fight training for “Beware the Night,” a film about two Bronx cops currently filming in New York. “I have been doing it every day for about three weeks,” he told us. “I am learning how to fight with knives and all that stuff.” McHale hasn’t escaped without injury. “I have bruises all up and down my arm,” he said. “That’s from the other guy hitting me with the knife. We’re practicing this Filipino style of knife fighting.”