I've worked at a lot of these conventions (PR/media stuff for various clients), and there's enough smoking hot people that it's really worth it. For every 5 katana-wielding neckbeards there's a sexy Pricess Leia, and when cons are happening in hotels its very common for these meetings to wind up upstairs, or the 'private parties' the fats aren't invited too. There's tens of thousands of people packed together for basically a 3 day party.