Was in Vegas few weeks ago, dropped by the GM "The Drive" for the 'vette parking lot experience
Here are some pics of the "track", basically it's a short straight followed by a hard left and a series of chicanes. Sadly, the 2 cars I drove (C6 and STS-V) felt a bit too big on such a small "track". Didn't try the "off-road" course since Hummer (H2, H3) isn't exactly my thing.. too bad they didn't have the H1 available.