If I'm driving from my air conditioned house to an air conditioned mall I want to drive in an air conditioned car. I'm going from my air conditioned hotel room to hot theme park where I'm going to be walking for miles. It may not matter if the gondola has AC. I'm assuming some kind of roof vent and fan so we're not sitting in a moving oven. Maybe the windows have to be tinted. If the posters are correct most of the time the few minutes we'll be spending in an gondola without AC is time we otherwise would be spending in the heat waiting for a bus.