There is absolutely no guarantee of safety in that situation, you just go with trust and hope nothing bad happens, or you could just gamble online and do not have to put yourself at that risk at all, there is 0% chance of anything going wrong there, well except you are going to lose your money either way lol.
But I'm sure that in the bigger casinos, the casinos wouldn't tolerate men getting drunk and not being able to control themselves. The drunken men must have been told to leave the casino because they would disturb the other gamblers. Casinos will do something about people who want to cause riots on their business premises. So if the casino is comfortable, women will still want to visit it to gamble or relax while watching people gamble.
They do have smoking areas and liquors are allowed in casinos. Maybe limited but I'm sure they allow drinking inside a casino and also they have club bouncers with huge biceps. But in today's era, cameras are everywhere. Somehow people feel safe when there are cameras in every corner.
Men don't go inside a casino just to drink though but women I think bring friends with them while they play slot.
Women are very social and they mingle with boys in the casino. They are not very social only to other girls sexier and more attractive than them.