Re: bartender... failed close?
She was turning you down.
When you number closed I would have suggested saying something like "So we should hnag out some time when you are not working."
Then she may have given you her number. Really you have to get girls to take baby steps. First get a girl to say she wants to hang out again and then if she doesn't offer her number up. Wait a little while, and make another hint.
The last thing you want to do is ask for a number outright. It can work, but its always better to suggest it and make them feel as if they offered it up to you. It is a dhv and makes them want you to call.
There is no such thing as rejection, only feedback.
Be the flame, not the moth.