This is very basic: you can't.
I mean, if somebody really want to gamble they'll find a way
if they can't control their urges they'd get addicted
only way would be casinos limiting user time but this goes completely against their incentives so it's not happening.
On the moment that someone is really that starting on playing gambling then this is really that indeed the time or moment on which you are really that still a noob where emotions and those urges
is really that at peak, then it would really be that so hard for you to completely stop midway not until you would be busting it all.