Everywhere in the world, doesn't matter where. It always helps to be funny. Really.
I use this example alot, but it's a good one though.
Let's say that this girl, let's call her Lisa.
Let's say that you, Lisa and alot of other guys / girls go around in a group. Then try to express urself, so she' and everyone else notices you. Try to be funny, u can maybe blow it up sometimes when u tell a joke or smth that u find funny. But everyone does that, Always.
And try to be more body active, try to get ur arms around hers. And if she take her arms around you, that's a good sign. if not, keep on holding them there, maybe she likes it, maybe not. And if u see any sign that she don't like it, like trying to get away or smth, then just release ur arms, and keep on walking besides her. Give her some compliments, f. example 'bout her hairdo or clothing. Try to talk about music, f. example; "What music do you like" And if she says like "Techno, cute and chill music or rap" or smth like that, then give her a song that's either techno, chill or rap. Let's say she likes cute songs, then talk with her on msn or some other programs over the internet and send her a cute song. Here are some ideas of cute songs, "Dj boonie - I can't help falling in love with you".
(Btw, if u see a really cute girl. She's uselly "lonely" since no one dares to ask her out

)
If you follow this steps u will get a little closer to ur girl

And do not forget to be "active" in the group, try to be the one everyone notices.
Hope it helps, good luck
Regards,
Hummle91