These popped up on our radar in the last month or so - more of our customers are using Craigslist to troll for additional participants and cast their net wider. I think this is a great move because the majority of auto enthusiasts still aren't aware that they can compete in an autocross or drive their car on a racetrack. Those thrilling experiences are what turn car lovers into lifelong car club members, participants and (just maybe) volunteers.
One word of advice: use language that complete neophytes will understand. E.g., "Come to a solo event!" means nothing to the general public but "Race your street car against the clock at Qualcomm Stadium!" is a lot more engaging and understandable to the uninitiated.
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