Big Winner, The Gomorrah

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough
Take the Gomorrah for all you can without being banned. Play Blackjack, Slots or the Roulette table and if the player's Luck stays, the floor manager will come by a few times for congratulations.

When the player has won 9,000 chips, The Omertas become a little agitated and ask the player to leave.