“Silverado” is fun. A throwback western made at a time (1985) when people weren’t making many westerns. Fun for audiences. While it’s true to the genre, everyone plays it with a wink and a nod, especially Non-cowboyish actors like John Cleese, Danny Glover, Jeff Goldblum and Kevin Kline. Decked out in period costumes and riding horses, they go about their business with gusto instead of looking like fish out of water. But Kevin Costner has the most fun of all in a bouncing-off-the-walls supporting role as Scott Glenn’s fun-loving, trouble-making little brother who can spin a six-shooter in either hand.