More general results regards gambling activity in the world:

Countries That Gamble The Most

And from my country, specifically:

Brazil Gambling Demographics: Who Plays Casino in Brazil

On the second link you can find several details about local gamblers' motivations, genders, how often they play, age, socio-economic levels, region where they live, educational backgrounds... However, each research regards this theme uses different mechanisms and data collecting tools, so it's natural there are different results in the end. That is something you can't avoid when looking for data on the internet.