Las Vegas and Offshore Sports books offer clients parlay style handicapping, where players make their parlay picks in the hope of winning a large sum of money. The more picks you have in your parlay, the higher the payout. Plus, if you ever travel to a Las Vegas Casino and Sports book like the MGM Grand, they will have parlay cards where you will have to make your parlay picks and you can win a great sum of money if all of your picks win.