The AAS is having an auto-x event October 2nd and 3rd at the Great America parking lot in Santa Clara.
I just drove my first event last week in Marina and had a blast. $40 for 5 laps in the morning and then $20 more gets you 5 more laps in the afternoon.
The events are safe for you car and you have the option of placing tape on the edges of your car if you are worried about scuff marks from the cones should you come across one. Your tires will get a bit scuffed, not that major.
More info at the site below.
http://www.americanauto-x.com/
I'm going to try and make it to the Saturday event with hopes of also doing Sunday if all goes well.