Ok guys need bit of help.

Ideas,examples etc..
A girl at a bar.. she having a drink alone.

So i need a good,unique,smart and funny aproach and opening.. but nothing childish.

Btw she's a 10 +

This is a pointless exercise. There is no 10 in the world drinking alone at a bar.

HAHA!! I was about to say the same thing!!!!!

I like the first answer you got poster but I would leave out the voyager stuff and just say "hey you ugly ass bitch lets go fuck"

If there IS a 10 drinking alone at a bar, she's drinking alone because she wants to be, and she wants nothing to do with you. Any good, smart opening you might approach with will be met with total disinterest. Move along.

Alright I will play along I'm sure much to the shegrin of the others since we've beat you down a bit.

What's the situation? is there a band playing? a sporting event on TV? What's she drinking. Is it something you don't know what it's called? What's she wearing, is there something about her fashion you could ask about. did she get that necklace on ebay? What kind of bar is this? Is there bottles of alcohol stashed up high out of the bar tenders reach? I wonder if they are real or decoration? I wonder if they have to get a ladder to get it down.
Are there other bars in the area she may have more knowledge of than you? Is she in town on business?

Something like that is where I would start most likely unless the situation called for something different. The delivery is more important than the question. You won't want to make eye contact at first if she's sitting at the bar facing a perpindulcar direction to your approach, but start the conversation in passing like it was some fat ugly old man sitting there instead. Your idea of a 10+ sitting at the bar alone is either a woman waiting on someone out smoking or taking a piss, or it's about a 7 you think is a 10, or you've never been to a bar. Most likely the bar tender is babysitting her so you better survive that bar tender making sure she's not immediately annoyed