Big Winner, Vikki & Vance

Big Winner, Vikki & Vance is a unmarked quest in Fallout: New Vegas.

Quick walkthrough
You need to play the games that the casino has to offer (Blackjack, Slots and Roulette) until you are banned from gambling in the casino. You can be banned by winning too many games and getting too much money from the casino. During this process, you will receive three different prizes from the casino in addition to the chips you have won. Each prize will be given after you win a certain amount of money while gambling. These prizes are usually given by the table manager of the casino.

Detailed walkthrough
Before you manage to start gambling in the casino, you will need to re-open it. You can re-open it by doing the My Kind of Town quest. After this, you will need to do the A Team of Moronic Mercenaries unmarked quest. After doing these two quests, wait 2–3 days and the casino will re-open. As you win the games the casino has to offer, you will be receiving the rewards below after reaching its money target:
 * 625+ chips = 20 more Vikki and Vance Casino chips
 * 1,250+ chips = Stealth Boy
 * 1,875+ chips = Leather armor, reinforced

After earning 2,500+ chips, you will be banned from playing games in the Vikki and Vance Casino. You can still use its other functions, like the bar, but you cannot gamble on its tables anymore. This ban is permanent.