mostly poker players.It is a game where you choose to bet or not,depending on how strong your hand is.All the other games have odds that favour the casino.Therefore you will always loose in the long run.
If you are disciplined and willing to learn than you can definitely make money from playing poker.Alongside discipline you have to be good at managing your bankroll.For instance if you have $500,You should be playing with $20-$50 at every table you play.Once you build your bankroll and poker skills you can move to higher stakes.

Gambling when done properly can be a very entertaining and enjoyable activity. When abused it can be one of the worst things in the world. Gambling is just like drinking. Out about 100 people who drink, maybe 20 have problems with it. Gambling is the same way. And the effects of the problem are about the same as well.