What about the approach suggested a few days back,
i think the message was "treat them mean and keep them keen".
Can't remeber exactly which thread it was but that was the gist of it.
This approach is very risky. You can fall into the friend zone where you are just a friend forever and you just get jealous of the many boyfriends that come and go. one of those plutonic deals. Now if its just a hot chick ratio or surplus you are looking for, with none imparticular, this could happen. You can't be picky though. The friend zone is gonna happen.