Tonight at 9p ET|PT – Watch the CNBC premiere of Hotel: Behind Closed Doors At Marriott.

Hotel: Behind Closed Doors At Marriott Tonight 9p ET|PT     CNBC goes behind the scenes to tell the story of one of the largest hotel empires in the world. Marriott International spans 74 countries, 3700 properties, and 18 brands. It pulls off the massive feat of housing and feeding guests in more than 645,000 rooms each night.     Watch the Preview CNBC explores the strange science of hotel pricing and profiles an executive chef. » Watch the video   Over-the-Top Concierge Services For concierges, it's ordinary to do the extraordinary. » See the slideshow     The Secret to Cheap Hotel Deals If you are planning a trip, these secrets might save you money. » Read the story   Puttin' on the Ritz-Carlton The legendary hotel chain is known for extreme luxury and exemplary service. » Watch the video     ACCESS "THE SOCIAL EXCHANGE" Like CNBC Smart on Facebook   Follow @CNBCSmart on Twitter       To unsubscribe to this email click here. If this e-mail was forwarded to you and you'd like to sign up for additional alerts from CNBC click here.     © 2012 CNBC, Inc. All Rights Reserved. 900 Sylvan Avenue, Englewood Cliffs, NJ 07632