The canonical pick-up line in Japan. Ne, kanojo, ocha shinai? This is The Oldest One In the Book. Don't ever try to seriously use this, it's like asking "What's your sign?" or something equally inane and worn-out.

However, it is good for a joke, especially if you're a foreigner; nobody will expect you to know this lovely phrase. It'll get a laugh every time. Well, no, I take that back. It'll get a laugh the first time. Then don't ever use it again.