Most guys come with a default setting which is pretty sexist. For them, seeing a woman alone in a casino is awkward and uncomfortable. But there pre-concieved ideas can prove very expensive at the end of the night.
It's easy to see where most people get their ideas about probability, and why most of them are wrong. The Gambler's Fallacy is the belief that a random event can have an effect on another random and totally independent event. It can't!
If you're a serious gambler, then have the right tools to do the job. That means having a decent deck of playing cards. Yes, they do cost a little more. But they're so much nicer to play with and they last much longer as well.