So where's the fun when you lose your money?
Sorry, I might answer your question by first asking you a question, and my question is, what exactly is the fun when people go to a cinema, buy tickets worth a hundred to a thousand buck or more, sit for hours watching a movie, and when the movie ends, they come out from the cinema, go home with absolutely nothing as a reward for spending that much money just to watch a movie?
I think what makes people to see or find spending large sum of money to watch movie as fun, is the same thing that make gambling, which includes losing money as well, as fun.
People have different motives as to why they are gambling, and whatever motive any gambler has, my personal opinion is that, it's still way better to spend money on gambling and lose it, than spend the same money on watching movies, because in gambling, atleast, one had the chances of winning even a bigger amount, where as in watching movies, there is no such possibility or chances.
So, in the nutshell, the fun is actually not in losing money, the fun is in gambling itself.
So, have fun gambling, if you lose and chose to be angry over the lost money, that is completely a personal thing, but atleast, enjoy the game you are playing, or played.