I've never been to a convention, but I've heard that there are three types of girls there.
1. Nice, Beautiful, and very much taken.
2. Big, Scantily clad or ugly, and very much single.
3. Murder you in your sleep crazy.
Granted, there may be a small handful of gems there too, just looking for a good time, but i'm not under the impression that most girls go to a convention to "hook up".