Hotel (1967)

Warren Trent (Melvyn Douglas) may own a hotel that's the epitome of luxury, but the accounting books tell a different story. The St. Gregory Hotel is pretty much flat broke. To prevent a corporate takeover, Trent pins his hopes on the ingenuity of hotel manager Peter McDermott (Rod Taylor). But a revolving door of zany guests -- including a drunk-driving Duke of Lanbourne (Michael Rennie) and an intrepid thief named Keycase (Karl Malden) -- makes that a challenging task.