gambling for fun will be an end to gambling houses.
Still there are people who want some realistic gambling experience and they will spend big money into gambling and still will expect only fun.
I agree this type of gamblers will be very less because in long run no one will be able to afford to lose big amounts. They will start having other type of entertainments instead of gambling.
As long as there are some gamblers who are aiming for profits, we will have an industry namely gambling. If each and every gambler will start gamble only for fun then gambling house owners will not survive. I guess humans are not that much clever to stop gambling for profits

The casinos will simply make less profit, if everyone started gambling for fun. at least folks would lose less money if they gambled only for fun. i gamble for fun and i lose a lot less compared to previously losing/trying to make money.