(The 'walking out of the cafe' is meant in the sense that there's outdoor seating. She went inside to get a drink, and came back out to sit with her friends. Anyways..)
You look at the girl with the glasses and manage a sheepish and awkward smile. You suck at talking to strangers, let alone strangers of the opposite gender, but here goes nothing.
"Uh, hey.. I, uh, I'm sorta new to town," you lie, figuring the best way around looking like a total weirdo is to make shit up to help improve the playing field, "I was wondering if you knew where the subway station is."
The girls, all except for the one wearing glasses, snicker and look at you like you're some kind of weirdo to approach them and ask such a thing. The fourth girl, on the other hand, says nothing, taking a sip from the straw in her drink and then waiting for her friends to quiet down, "Um.. It's on fifth, near a clothes' store called CJ's."
You know this, of course, and the directions defeat the whole point of talking to her after all, so you respond with another lie, "I'm not sure where 'fifth' is. I don't suppose you could show me, do you?" You try to smile and look pitiable - not like that's a very difficult thing to do. The girl's friends all look at you suspiciously, as well as with a bit of resentment that you're pretty much ignoring them as far as asking for help goes. The blonde leaning in and muttering something about you looking shady and not going with you, but the girl smiles awkwardly, "Well, I guess there's no harm in showing you how to get there at least.." She gets up, despite her friends protesting, you earning a few more glares from the stuck up bitches.
The glasses-girl grabs her schoolbag and slings it over her shoulder, walking around the table and then looking at you expectantly, "Shall we go then?"
(And I'll carry on from this point tomorrow night. Hope you guys enjoyed it. I might take shit down a very different road as things progress further.)