Vegas Leagues are very common here in Southern California. Basically, you bowl anywhere from 16-33 weeks like a regular league (often it's split into two 24-week leagues per year), and then you have your sweepstakes bowling night in Las Vegas. The sweeps is handled the same as any other sweeps, with the exception that you bowl in Las Vegas instead of your home house. Part of your prize fund is used to pay for your rooms for a couple of nights at the hotel where you'll be bowling (usually Orleans or Sam's Town).