I'd say, "You're wasting your time sweetie. I play for the other team."
Seriously though, years ago a guy I know told me that during his card counting days a similar thing happened to him one night. He'd been playing for an hour or so when an attractive young woman came to the table, sat next to him, and started to take an interest in him. Now he isn't movie star handsome, but he is a good looking man.
The hitch is that he never realized that he is attractive, so he thought of two reasons why a woman like this would be paying attention to him. One is that they thought he was counting and called her in to distract him from his game. The second is that she was a hooker or something and looking for his money. The third reason is that she may have actually been attracted to him, but of course he would never have considered that one. So aside from a word or two he pretty much ignored her and she soon left the table.
I told him that he was better looking than he thinks and that if that ever happened again, and she asked him up to her room, then he should do what I or most women would do if they accepted such an offer from a man. I told him to call me or another friend, tell us what room number he will be in at which casino, and if we don't hear from him within twenty minutes, or whatever time period you choose, we should call the police.
When you get to the room admire it and look at everything like you're impressed. Make sure to check the bathroom and closet if it has one because that is where someone may hide. If there is a balcony take a look at it and make a comment about the stars or the view. Floor length drapes should also be checked, as well as under the bed.
It would also be immediately suspicious that something was up for a woman to invite a strange man into her room. Unless of course she was up to something, and what that "something" might be should bring up your radar.
Though not really related to this situation, there is a general safety tip that many don't know about. If you quickly push your smart phones power button five times it will bring up a slider to call 911. In the "settings" you can also set it to call 911 automatically when you do the 5 rapid pushes.
Life-saving tips for phones & watches
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