It all depends on the nature of the person in choosing friends, even though they are in a gambler's family environment, even though each child has a different nature but the role of friends in the social environment can affect a person, even though there is a term (fruit doesn't fall far from the tree) that term sometimes often pinned by people, to be the family of the gambler, the role of friends in life can be good or vice versa so it all depends on how they choose friends in their environment..
Being surrounded by bad influence friends can influence a person even if he or she grew into a good environment in their family. That's really something to be thought about in terms of behavioral process as everyone is learning new things not only from their parents, from the technology but mostly, from the surroundings and neighborhood they live in.
Several factors influence a person's lifestyle but the most powerful among them is the family the person grows into and the kind of environment they find themselves in, It is easy for a child to copy the lifestyle of the parents but it is sometimes minimal what environment contributes and even the environment a child grows into is chosen by the parent because the child can not determine the environment they grow up is the responsibility of the parent before the child was born to find a better environment for their kids.