In Japan there are many game centers where you can find all kinds of weird arcades. In the big ones there is always a “horse simulation machine” where many people can join the same game, make their bets and watch the race on a big screen or observing little-horse-figures moving on some kind of scenario.
In this video you can see one of the machines with horse figures.
These pictures are from one of the latest machines from Konami. Look at the guy in the last picture, he is reading manga! while the simulator is showing the final results.