They have a bank of slots that are very similar, 9 or 10, by similar I mean the pay outs are the same on each machine. You buy a chance to play for $20 and when your turn comes everyone gets 300 credits. Spin till all credits are gone. You can play in every round if you pay the $20 each time. When all the players who have signed up finish the 9 highest scores plus they usually draw a ticket from all the losers, get to go one more time and on the last round the highest score wins $500.
Laissez Les Bon Temps Rouler!