A beautiful blonde goes to Las Vegas. She's in the casino for about an hour, when she realizes she's thirsty. So she goes to the soda machine in the hall puts in a dollar and a Coke comes out. She puts in another dollar and another Coke comes out, she puts one last dollar and another Coke comes out.
A man sees her, and asks, "What are you doing?" And the blonde responds, "Duh!! Winning".