Hey man.
Hooking up right off the bat is never a way to win a girls heart, and is no way to start a relationship.
A girl that is susceptible to that type of behavior, is usually damaged. So, if you really want to get to her that bad, just pull her aside and be like "Hey, we can just forget everything that happened, and be friends." And try to rekindle a sexcapade, or make an actual relationship from there.
Girls love attention, but giving them too much just freaks them out.
IMO if you're going to take my advice, and try to get her to be your friend...Lay low for a while, ignore her. When you see her places, don't even acknowledge that she is there. Those types of girls WANT to be treated like a piece of shit, because that is what they are used to. She will respond to it, and then that is your chance to "change her outlook" and get her to stop sleeping around.