It kind of goes against the grain when a woman makes an approach on a guy, rather than the other way around. However, from a man's perspective, it can be quite pleasing to find that a woman is attracted enough that she wants to make an approach, so you shouldn't question whether you should or not. You should. The one thing to really take note of, is, that you MUST approach a man the right way, or else you can easily "scare" him off.
What do I mean by this?
A lot of men are...