Hotels say they need to protect themselves from travelers who try to game the system by booking multiple rooms and canceling on short notice in the hope of being able to quickly rebook at a cheaper last-minute rate. That has become a growing issue with the proliferation of sites and apps that make it nearly effortless for travelers to book, cancel and rebook at no cost. The new policies, hotels say, will increase the availability of rooms in locations like New York City, where occupancy is high and rooms can be scarce. But some business travelers and managers say these policies effectively punish them for circumstances outside their control. Get the full story at The New York Times Read also "Marriott tightens cancellation policy"