This can be risky ploy, if you are sure that you intend to fuck the guy this approach could add a little spice to the evening. If you do this it is a pretty good bet that you will get fucked whether you want it or not, especially if drugs or alcohol is involved. Playing games should be restricted to people you know well. Despite the rape fantasies that some people have a real rape is generally not a fun experience for the recipient.
If I was out with a woman and she was flashing pussy at me and then shut me down I would dump her ass at home and she wouldn't darken my threshold again. But she wouldn't get raped.