yes i can say its more of a guy thing. one of the reasons why i think its so is because of the financially responsibilities that the men do shoulder and also that men always want to earn more so its pretty easy as a guy to get involved and also if you have friends that are into it then it will be more easier. but i think things are changing and have seen some ladies go into gambling although the percentage is still kind of low but maybe in some years to come we will have a good population of them especially for those who wants to do it for fun.
Men are known to provide money for the family but women is the one's who hold/budget it. They can choose to gamble it. Some men can earn sufficient money from their jobs alone and there are some who aren't but they can still treat gambling as a source of entertainment and not a source to get additional income. It's the same on why some guys drinks a bear or buy a cigarette.
These small things can ease their tiredness from the long day/week of work. I don't see it as a problem if there are more men are involved in gambling than in women but in fact I find it good because the men or husband won't worry as gambling can sometimes cause an addiction.