The Naked Storm: A Classic Crime Novel

At first it was just a lark--bribing the stewards to steal food, bribing the conductors to steal blankets, raiding the club car, becoming a trainful of drunks. But then--then they began stealing morphine, and after that they began swapping mates, and after that...

Finally the lights went out. And a modern-day miracle of streamlined engineering was turned into a cage of evil, human beings become beasts, and for three days the meaning of civilization was forgotten, and carnality ruled!