I found a new little tiny track in Tacoma.
 

I was at the Freight house Square in Tacoma last night for dinner and there is an xMod's track setup. You rent his xMods for $1 per minute. When running with amateurs, it is almost a demolition derby but it is only a dollar and indoors and not your car, if you get board and are in the area. I don't know if you can run your own there.