Yes, if only for fun, there is no shame at all. But if we lost much money and made bad influence on our family, it is so shameful. Big shame
If we can still run our daily obligations, such as when we are already married and we have not forgotten our duties as head of the family, then gambling is not a shameful thing. But, in fact, many people will forget their responsibilities when they had a gambling addiction and that is why they should be ashamed and have to try to quickly escape from the cycle of gambling.