The hardworking folks in the Washington DC area must really need to let off some steam in fancy cars.  We already knew of one luxury car rental service in McLean, Virginia, now here's another. Pure Exotics Dream Automobile Rentals has a couple of cars and just addedd a new convertible Dodge Viper SRT-10 to its rental fleet. Their stable also includes a Ferrari 360 and Lamborghini Gallardo. You can make the Viper yours for $600 per 24 hours.