But that is just a trap and actually they are losing more money than they win but they are realizing that too late.
but they are always gambling every week or a certain time? what it can be called with addiction?
That is where everybody starts. A simple bet for fun and then it becomes a regular thing. Later it becomes an addiction. If you continuously gamble with out restrain or control on how much or how long you gamble, then it is an addiction. If you don't want the trouble of becoming a gambling addict, then refrain and never try gambling at all. Never bet even just for fun. One innocent bet can lead to a life of gambling.