Threaten to withhold unless she offers you more

You've got the advantage in a situation like this. It's not a cakewalk, since you're on their turf and they have security (and the frat brothers coming over), but girls understand that dealing with intimidation often comes with the sordid side of **** culture.

You make sure the other girls are gone first. Even the leader, Erin, seems to get that you want to have some time with Alexis alone, and walks off. After another minute or two of typing on her phone, Alexis looks up, surprised to find herself alone with you.

"The fuck?" She dumbly wonders.

"You lost track of what's important," you say. You hold out the bags and Alexis goes to take them, but you lift the product out of her reach. The diminutive college schoolgirl can only frown at you. "Now, you've wasted my time. If you want this, you're going to have to do something for me."

Snapping her phone shut, Alexis looks almost as intrigued as annoyed. "Oh yea?" she asks cheekily. "Like what?"