Umm, what planet are you guys living on? Girls form the majority of visitors to every Sexpo. I think it's something like at least 60% of the visitors are females. And they come from all walks of life. They're usually so sexually repressed that something likea Sexpo is incredibly exciting for them to all go as a group of friends, giggling and dreaming of all the sexual stimulus.
But as to Black_Italians idea about picking up there: it wouldn't work. Not because the girls would be sluts or whatever, but because they will all have the prejudice that any guy at a Sexpo must be a completel loser porn addict. In the mind of a woman, porno is gross and disgusting, but vibrators the size of anacondas are liberating and fun.
So the chicks there would be just like any chick you'd meet anywhere, but they will automatically form a negative opinion of any guy that tries to hit on them there. ESPECIALLY if he is there alone. If you wanna go, go with some guy friends and maybe some female friends as well.