A Key to the Suite — John D. MacDonald

Corporate hatchetman Hubbard is on his way to an industry convention to carry out a termination - a fancy way of saying he's about to toss a man and his family out in the street. But the convention is a modern Sodom of cheating husbands and ambitious wives, ready to put out as much as necessary to ensure their husbands' jobs - and a plan is afoot to smear Hubbard ...