There is a thriving 1/10th pan car class in the Los Angeles/Orange County area. Check out the "Other Classes' forum here for their thread to see what I mean.
What's funny is, now that we are racing touring sedans on foam tires indoors all over the place, why don't we just go back to pan cars? They are faster and in many cases less complicated, and cheaper for people to get into.
Oh, wait, I don't want to start that debate.