He offers to help

Karen looked scared as more sweaty nerds with sweaty groping hands approached her. That's when John swept in and said "Come with me."

Taking her by the hand, he pulled her out of the sticky situation.

"Thanks but... where are you taking me." She asked as she followed him swiftly through the crowds.

"To get a disguise. You can't walk around looking like yourself. Obviously you'll attract unwanted attention."

"Oh, right. That makes sense. So we're going to one of those costume booths then?" She asked. John didn't answer, he just continued to drag her through the crowded hall until they arrived at their destination, the sluttiest costume booth in the hall.

"Here we are. Pick something here, and no one will recognize you."

Karen browsed the costumes. Not the sort of stuff she would normally wear but she trusted her savior.