They are usually available to drop guests off within a short distance of the hotel at no charge. Considering there are only a few cars, I can see why hotels don't advertise this fact. Most times the cars are being used by other guests when I inquire, and I grab an Uber instead. That being said, I did get a ride in a beautiful Maserati at the Excelsior Gallia in Mlian once. I can still remember the interior!