I work in Denver next to a hotel and the Vallet parking is on the side of our court yard. Numerous times I've seen exotics parked out there but two that come to mind are the Bentley Continental GT and the Rolls Royce Phantom.
I remember thinking when I saw these cars, if I owned one of those vehicles I would almost rather the vallet park it in the garage because hundreds of people walk right by them when they are in front of the hotel.