The Podracer games, there were two, worked because the GM, our illustrious Hammer ran it in a unique and fabulous month-on, month-off cycle. Like with Formula One (the only racing medium I am familiar with) there were several venues around the galaxy, and on alternating months, all the racers and hangars on, had to make their way to the planet/location in question; I-H would do an intro' post (we are here, celebrity guests come out and wow the crowds, the lights go green); the GM steps back, and monitors the race whilst the players try to complete three circuits of the track. There was a system he had in place so that after you posted, I think two other players had to post before your next move, and so on. In the off month, we were all allowed to wander around the Racer Village, engage in intrigue, get interviewed by the holo-media, and so on. It was an all-round game. If you look in our mod's profile, I believe he tends to have links to his completed games, so you can check them both out.