I never said it comes with the job, nor that podium girls are supposed to be groped. See my response to spalco.
I don't think model or hostess at a convention are quite the same as podium girl, however. A model works showing the newest fashion trends. A hostess receives guests, helps them, serves them, etc.
Their being good-looking girls plays a role, certainly, but their job is not showing their pretty selves to the world for the sake of showing their pretty selves to the world, which is precisely the definition of a podium girl.