I was dropping off a rental car at the Airport Avis, at 4 in the morning to fly out for a trip. With nothing really directing renters on where to park to drop off a rental, how is one suppose to know you're not to park in the lot spaces, but to pull the car up to the rental booth? So instead of having me pull the car up alongside the booth, the male attendant is whistling, and yelling that I'm not suppose to park in an empty space, but to leave the keys in the car, and get my paperwork. Either have clearly marked spots for customers to drop off cars, or have someone with some etiquette on dealing with customers.