Even if you hire a 50/50 split, it doesn't solve the problem because the ratio in conference attendees is far from even. The conditional probabilities still lead to the conclusion the article complains about.
Actually this event is a consumer tech exhibition where ~43% of the visitors will be female - however the vast majority of hired, good-looking booth staff will still be female.
(And my comment wasn't so much addressing the article as the GP comment which said "I wish we had more men who dressed up as booth babes.")
