You're intimidated to talk to her, but she definitely catches your attention. Booth babes are eye candy. If people interact with them, better, but I'm sure the company won't mind if people want to hangout around the booth just because of the beautiful girls. There's people other than booth babes who can pitch and sell products.
So the question is - why not hire male models to pitch wares? And the challenge is to be aware of the effect of beauty and to change our behavior.