Chicago Region has had a PDX program for the last...5??...years that is *remarkably* very similar to track night. And it is a huge success! Typically we are, or very close to, selling out events on our schedule (6 nights a year). We only allow passing on ONE (novice) or TWO (Intermediate/advanced) straights and ONLY with a waveby. We even dictate which side you can pass on!!
There is no need for head/neck restraint, nor physical, nor a license. It is a VERY safe program and in the 5 years we have run, have never had metal to metal contact. A couple incidents but they have always (oddly) been in the advanced group with drivers who have run out of talent.
It's a great program that WE have, and not sure how Track Night will proceed. Chicago Region, however, will not be participating in the National version. Ours is doing just fine, thank you.