I'm not really a horse capper, but put me in Vegas with drinks in hand at 10 a.m. with a couple buddies, and we can bet horses (and lose at it) for hours. My experience in books is limited, but I remember that the Stardust had just a boatload of tracks going. Even at the Bellagio, I remember they had at least 2-3 harness tracks going at night on the left side of the book.