I ain't an expert, but I wouldn't email her another time man, that is really AFCish and come across as a DLV/needy, and that's not what you want!
I like your idea of going to the casino (with your mates ofcourse, she'll never believe you came to the casino by yourself without the intention to see her

) and just see what happens. Don't completely ignore her, but let her know she's not the center of your attention (which she is but she doesn't know it) If she starts emailing you or comes talking to you that night you know you did a good job.
And if she still shows disinterest just pull up your shoulders and look for another.
That's my advice, I'm curious what'll happen in the future, let me know if you want