Pictures of a robust Winston Churchill and a young Queen Elizabeth decorated my art-deco stateroom aboard the Queen Mary in Long Beach, California.   The iconic 1930s ocean liner, now permanently docked on the Pacific Coast, has harbored movie stars, British royals, and prime ministers–as well as more than a few ghosts. In fact, Time magazine designated it one of the most haunted ships in the U.S.   I was thrilled to be one of the ship’s first overnight guests when she finally reopened in...