driving to ksu and parking is incredibly easy. easier than taking a bus in almost all cases. and nearly everyone in manhattan has a car.
Why are you under the impression that people with cars don't ride the bus?
If I were in Manhattan I wouldn't take the bus to the grocery store, but depending on how the bus system is, I'd take it to campus, or work, or to the park. Having a car and riding the bus isn't mutually exclusive, neither are elite clubs. I'd be willing to bet that in cities with good mass transit systems up to 20% of riders have a car. When I lived in Boston I had two cars and used busses and trains. I was in Boston two weeks ago, rented a car and still took the bus to the bar. Also I don't think there are as many people in Manhattan with cars as you think.