What's your best off the cuff in on a Friday? Let's do this! And I'll encourage the whole sub to start participating on least Friday and Saturday nights!

Hey what are you drinking, because you're making it look good?

Let her do whatever for a second if you're approach was warranted ie eye contact or whatever maybe she just happened to be next to you at the bar.

Is that your favorite?

Can I try it?

Other dumb questions (and play it up even if it's beer);

What's in it?

How's it made?

There now at least you've opened, and the conversation is started, if you made it to the follow ups just ask her, her name. Then do a quick test which is, don't offer yours. If she asks then you've just gotten the the third sign of interest from this 30 or 45 second conversation.