Run sprints and midgets on Friday. 2 classes. Focus on the show, not the car count. Fans don't want to sit and watch junk. Let them bring coolers. If you had 20 sprints and 16 midgets every week that's enough for a good show, trust me. Hot lap at 7.30, race at 8. Take up the extra space with driver introductions on the front stretch before both features and cool victory lane celebrations. Also, the early quit time allows everyone to flood the pits after the races and get the kids in the cars for pictures and autographs.