Pete Fountain, whose easygoing, apparently effortless style on the clarinet and his perpetually sunny disposition made him a natural ambassador for New Orleans, died Saturday in New Orleans. He was 86. Other details were not available. Mr. Fountain, who was in hospice care, had been in poor health in recent years, suffering a stroke and undergoing heart surgery.Unlike other musicians whose lives were marked by marital strife, substance abuse and run-ins with the law, Mr. Fountain lived a blissful existence with Beverly Fountain, his wife of 64 years, and a sizable number of children, grandchildren and great-grandchildren. A regular on...