Hi Jerry,
Please don't be disappointed by only four turning out for your event. I'll guarantee that's three more than would have shown up otherwise!!! Main thing is that you had a good time and that you all spread the word encouraging more folks to participate next time. We expect that it'll take some time before our guys are regulars at these events. Advertise in the region's newsletters, and try to get the new car owners to put a toe in the water. They'll be back! I noticed from the wonderful pictures that you posted that Laguna Seca doesn't require roll-bars for open cars. That gives you a much broader group from which to draw, as many tracks do require them.
Keep up the good work, and enjoy yourselves on the track!
Gary