Some people are just happy to just met people from the casino and some are just fond of playing without thinking about how much money they lose just for the sake of entertainment. And there are some other people that who gamble only for the sake of profit so you can't just tell it if don't know the reason of why they gamble.
No, there are many gamblers who actually do not have any proper reason for their gambling. They simply spend some money on daily basis for their gambling still they cannot state one particular reason why they are gambling because they are not getting a satisfaction level of emotion with their gambling activities as they are not finding the exact result from gambling so they keep trying to find that.
They mostly do gamble just due to the got introduced to it and they do not know how to avoid it. They are finding some soothing from that environment, that could be the one reason but definitely they cannot state that. When you do not have one proper expectation from gambling like that could be making profit or finding entertainment or anything similar to that, how you can justify your gambling activity's core reason. They gamble because they are aware of existence of such a place and their financial situation is also allowing to do so. No other proper reason for sticking with that.