Smooth-Talking Criminal

Smooth-Talking Criminal is an unmarked quest in Fallout: New Vegas.

Walkthrough
Talk to Francine Garret of the Atomic Wrangler Casino and ask her if there's some work to be done. This starts the side quest Debt Collector.

One of the debtors who has to pay up is Santiago, a smooth talker residing in a squatters camp near Freeside's East gate. He tries to talk his way out it by telling you that he's a VIP at the casino and offers you a password to get a discount at Mick & Ralph's. If you believe him and subsequently pay him for the password (with Barter skill for less). If you don't mind the standard prices at Mick & Ralph's, use force to get Francine's money like you were supposed to.