Hysterical or historical, ghostly spirits make themselves as comfortable in America's B&Bs as living guests do, and not just in the dead of night. In a recent B&B survey, conducted by BedandBreakfast.com, innkeepers revealed that nearly 20 percent (an estimated 3600) of the inns in the United States are haunted. This leaves plenty of opportunity to sleep with a ghost for those who seek experiences with another world.