$100 for 4 days of racing...That's only $25 a day! Plus you can pop a tent there and stay there till Sunday.
That's not too bad when you break it down.
--OR--
If you are just going for Saturday, that's only $8.33 per hour of professional endurance sports car racing!!
--OR--
Spend the $100 on Patrone and Miller Lite and camp out in front of a TV and PAR-TAY!