Anthony Hamilton8 specialty websites that let you book a luxury hotel room for cheapverified_publisherBusiness Insider - Jennifer PollandLuxury hotels can cost thousands of dollars a night, but they don't have to. Insiders know where to book a luxe hotel on the cheap. Of course there are the major online travel agencies like Priceline, Orbitz, and Hotels.com, but those are just a starting point for in-the-know travelers. Here are …