Karyn wasn't sure if she should stop Jon and inform him of his bad decision, or to just let him be, since he brought this on himself.
After some thought, she decided to let him be. But that ended up being a bad decision, because about ten minutes later, a couple of guys starting hitting on him. This would have been fine if Jon was a girl, but he wasn't.
Jon looked like he was definitely having a problem with the two guys, so Karyn decided to enter the dance floor and try to help out.