Hotel Tonight lets users add whimsy back into their urban escapes

When I stare at my cellphone, with all of its e-mails, to-do lists and calendar appointments, I often feel as if the device is conspiring with forces in my life to schedule everything down to the last minute, leaving little room for, say, an impulsive trip out of town. But an app called HotelTonight is based on the opposite idea that smartphones are ideal for creating last-minute plans.