Okay, here's where most men make the biggest mistake. They try how to flirt with women and they try to get the attraction right from "Hello" to "Can I get your number?" in one shot... and they surprise why they get brought down. Get a woman number.
This kind of technique of how to flirt with women comes off as frustrated and causes the woman to consider that the man is interested in her, which he is.
However, building interest with women is all about keeping you speculating and making yourself a challenge to them. How can you do this from the comfort of the first interaction? Women gets what they want by means of art of approaching.
Easy... you approach her, talk to her very concisely, and walk away. Then pass and talk to someone else for 10 or 15 minutes, and if you're intrigued in her, go back and deal with her again.
What you'll notice is that by the second approach, two ideas will have happened: she'll be at least slightly curious about you and why you didn't do what some other guy did to her that night...ask for her number on the first approach.
You'll also see that you'll both be a lot more snug with the interaction.
Second, Use Jealousy
Jealousy is a great motivating factor when it comes to making attraction and setting yourself apart from the dozens of other men who are rival for a woman's attention.
If a woman has any kind of concern in you at all, seeing you with some other woman (even talking to one) will build a feeling of urgency in her. Having a 2nd chance is ideal to learn it.
So after you've practice art of approaching the second time, speak a little bit longer...but go and visit with another woman who you're serving with. Trust me, this will stir the emotions of jealousy and make girls concerned take on a more active stance in pursuing YOU.
Engage Her and Build Jealousy
Once you've talked to her for a while, ask her to dance, to play a game of pool or darts or any different kind of activity which doesn't involve too much talking.
This will get her used to being around you without additional tension of having to carry an interaction. Also, if the activity involves a few people, you can take that opportunity to introduce her to some of your friends...or even other women who you've met.
Taking Things to the Next Level
Take her right away to a place where you can have some breakfast and talk. By the end of all this, you'll have an access to get her phone number or to send her a text the next day. Anything you do, don't try to get her home. Know about 2nd chance to consider it.
Even if she allows, women who sleep with men immediately often get agonized with blame and grow cold towards that man.
Rather, get her phone number and make a short-term sacrifice to gain a long-term prospect with her later.