That's what I find so strange about the original post. She's assuming they're there as eye candy and they sure don't seem to be. It's odd to hear a woman assume that other women (especially since they're pretty average) are there for their looks. The few I've talked to were far too knowledgeable to be some sort of incognito booth babes.
Booth babes are usually given a few talking points and know little to nothing else about the product beyond that. They pass you off to the nerd the second you appear interested.