Highest turnover based on what? Highest gross, highest per race, per meeting?
Not so sure it would be sprint lane related or just when they race.
Ballarat probably has more Fri/Sat nights than any other country clubs, and when they do race midweek it still seems to be under lights. I would hazard a guess these time-slots get more punting dollars than daytime midweek time-slots regardless of tracks involved?