I'll kick it off. My mate reckons this line never fails. I tried it once and it worked!

Guy: Excuse me, but do you know what a penguin with a hammer is called?

Girl: Eh? What? No. **Looks at you perplexed, usually with a grin**

Guy: Well, neither do I - but I tell you one thing. It is a good ice breaker..

And you're in...

Cheesy pickup lines:

If I could rearrange the alphabet, I'd put U and I together.

You must be a parking ticket because you've got fine written all over you.

Hey ladies, I don't want to come between you... or do I?

Giggity giggity.

That's not my phone number, that's my salary.

From an old Hart to Hart episode.

More cheesy pickup lines:

He:  Did it hurt?   She:  Did what hurt?  He:  When you fell from heaven.

Is it hot in here or is it just you?

Did you fall out the ugly tree and hit every branch?

I am single.