Lots of people gamble as a pastime, in a way akin to going to the cinema. for the small adrenaline rush you get by doing something out of the mundane where you could actually win a bit of money if you are lucky.
Most people that gamble know that they will lose and the house will win, but the element of uncertainty is enough to make it a pleasurable pursuit.
The means-and-ends moralists, or non-doers, always end up on their ends without any means. -- Saul Alinsky