It's all about your approach - you mess up here and it can be embarrassing as you may have discovered in the past.

Whether you are approaching on the street, in a cafe, in a bar, wherever you meet women - delivery is as important as what you say when you do approach - 80% body language is how we communicate, so be wary of what you are communicating to her.

If you are being way too obvious in your movement toward her, or what you just said to her - beware, for you have already been judged.

If you guys had been locking eyes - then you can be forgiven (watch out here).

As she is indicating that she already wants you to talk to her - just be wary that nothing is set in stone, and you can still be blasted right where you stand.

If you don't care, then you're thinking along the right terms.

Rejection is not so harsh when you are detached from the outcome and conversely - your performance is that much better without the pressure.

If she has seen you coming from a mile away - you've just given her ample opportunity to shut you down. A better approach would be something just that little bit more on the spot - it just happened, almost by coincidence.

You could say something random like:

"Did you guys catch the name of the girl who got chucked out of here 5 minutes ago?, it was hilarious, I found her shoe and put it in her bag as she was carried out - I got no thanks!"

When you approach, you have to be conscientious about what is comfortable, what is audible and your position as to who you are addressing.

If talking to a girl in a group, be aware of who she is with. If she is with people, get to know them as well even if she introduces you to her boyfriend.

Having fun is key, if you're having fun, she'll pick up on that and be more responsive to you when you do approach.