SLIM & CHET The longer we live, the longer our past, the shorter our future, the fewer our friends and heroes. Wednesday was particularly bad. I always enjoy grossing people out by relating how, some 30-plus years ago, I gave up backstage passes to Springsteen in Madison, Wisconsin, to drive to Milwaukee to see Slim Whitman. I’d say it’s the smartest thing I ever did, but in all fairness, I can’t remember if it was Slim or Mickey Gilley—which...