http://americanstreetcarseries.com/?page_id=207
http://americanstreetcarseries.com/?page_id=425
I've run the "Run to the Coast" event with my Trans Am the last two years and these are pretty fun events. You won't get the kind of track time that you might with an ordinary open track day, but the competitive aspect is fun. RTTA follows the typical RTT format: a bit of autocross, a bit of track time, and a speed-stop challenge.