Have you ever wonder why even there are a lot of negative things gambling bought, it still doesnt leave us ? Is that so, gambling has been a part of our culture , even you have plenty or not. Rich people often socialize in the form of casino, while the poor are contented on country games with lower bets. I, as a person living on a third world country, witnessed how gambling form our culture. Town celebrations or "fiesta" are not complete without low cost gambling houses called "perya" where you can bet starting from almost $.02 and above. Every corner of the street has some kids playing coin games and even a wake makes its company awake using card games. Weird isnt it? How about in your country?
I don't know are you aware of it but your sentence "Rich people often socialize in the form of casino, while the poor are contented on country games with lower bets." explains everything in gambling. It's actually very simple, I will try to elaborate it, rich people gamble for fun and they enjoy in gambling that's why they win more often, poor people are targeting big wins with small bets ans usually get out from casino disappointed. Gambling by many is marked as something evil because of this people who go to casino and lose last money they have, they borrow money and they lose that in wish to make some huge money with gambling, that just leads in bigger problems.
I saw something on discovery channel about first American lottery. They had some debt and they made lottery and earned a lot of money, some guy have a collection of lottery tickets, and he explained how lottery recovered American fallen economic on that time. Now you figure out why there are so many casinos everywhere, probably because they earn a lot of money for some people in power.