So there you are, lounging by the pool at your fancy hotel, when it hits you: You forgot to bring your $350 gold handcuffs! You also left your $25 fake eyelashes at home! And, dammit, you didn't pack your $400 marabou feather vest! Well, don't worry your pretty little head. The vending machine at Mondrian South Beach — the glittering, chandeliered, luxury waterfront hotel on West Avenue — is stocked with all of those things. There are no candy bars or soda inside this sleek white contraption, which takes only credit cards and sits across from the hotel bar. Dubbed the "Semi-Automatic," it is also full of T-shirts, sunglasses, and best-selling novels. Oh, and the keys to a $90,000 Bentley Arnage T. (A voucher is printed and the vehicle is delivered to the hotel in minutes.) You know, just in case you left yours at home.