OK, maybe the basic idea was a bit too basic

What I have in mind is that the player controls subtle parameters like where to go, where to look, what to wear, etc. Some may raise attention while others not. The more crazy the spectators get the better the result but once you go over the limit you will be warned by the assistants and if you go way beyond the border you'll be asked to leave the store.
It's not about fucking in the store (while I'm not sure what the climax could be) but more about turning others' heads.
Would it be more believable if the story is about two women in a kind of competition game than about one women trying out what her effects are? A second women could act as the observer like the cameraman was in the Money Talks game and that would explain the third person perspective in the game.