So am just curious to know if these little games are the one's that got to him or already developed such habit and to know if possible that the practice will continue elsewhere after leaving there when he lost the money and to look for means through gambling to recover it.
I think he will still continue that habit outside. What he showed in that place was just a little of it maybe he is just calm because it was a game Involving old long time friends which he was controlling his attitude but I trust if he moved from that place he may be worst than that. You know different gamblers and their ways or should I call it attitude towards loses. Most people can be calm if they lose or win but some will be angry to the point that they may even pick up a fight with you. So it's a normal thing. Maybe it's just your first time of noticing it from him.
It's about learning to control yourself in such situations. I know it is not easy for a person with an aggressive nature to control themselves, and it is icing on the cake if they are a gambler as well because aggression and gambling are a deadly combination and someone who got it can cause a lot of trouble for people around them. This mostly becomes the reason for such people having no friends or family members being interested in having them around because they can do anything at any time.
Aggression is as bad as greed because these two things only make us lose in life in the long run. If you are greedy, you will lose monetary value and financial holdings, and if you are aggressive, you will lose emotional value and all your relationships, in both cases, you are at a big loss.