http://www.autoshowinmotion.com/pls/asim/frmMain.show
You must be 21 or older to drive the car

Go there and sign up for this. I went this past Sat and had a freaking blast. Got to do the Vette Z06 with three laps--had to go out and come back in and re-register at the event) They had tons of great vehicles. The ones I drove were:

cadillac CTS manual
Vette
H2
04 grand prix GTP-G
Impala SS(supercharged)
Monte Carlo SS(supercharged)
Pontiac Vibe(for shits and giggles--had it up on two wheels around the course)
Pontiac Sunfire
Buick Park Avenue
Sierra
and more(those are the ones I remember)

It is totally FREE and they are true to what they said--NO SALESMAN ANYWHERE!!!!! With the H2 and the Vette they have somone ride with you,but all other cars they give you the keys and let you go by yourself. They give you free lunch, other free shit from GM venderos like XM and on star. You can go outa nd come back as many times as youwant(you just have to re-register--helps if you want more time in the Vette) You do have to drive a regular car before driving the Vette and drive a truck or SUV before driving the Hummmer)

they aslo had the Chevy SSR and Cadillac XLR there tearing up the track next to the Vette(and they were going faster and better than the Vette)