Are you able to take pictures of the cars if your just staying at the hotel

You can

You can't get near those cars unless you're paying to drive the race track. Beth is right, zoom your camera from the Overdrive lounge roof top :)

You may take pictures of the cars that are on the track at Porsche from OVERDRIVE Lounge located on the hotel's 8th floor.

There were cars on display in the parking lot. I don't think they would mind...