Well, here is a quick thought. First of all the racing club. Obviously give them free entrance and a room to entertain in at no cost, make them pay reasonable prices for drinks and food. As for rebates, no reason why club and tab could not split rebate, maybe 1.5% each on turnover. Tab look after elite customers, so why not these guys as they bet on course.
So $100 k turned over, gets them $3k that they have to re invest on the day, club gets money off grog and food, and a whole heap more people on course? No doubt you will pick holes in this suggestion