Of course, Elphie had just been playing. She didn't get to be like this very often. Usually only when she was around Galinda, and even then it sometimes took some work getting her to just be free and cheerful. But when she saw Elena storm out, she couldn't help but frown a bit, of course knowing she must've crossed a line somewhere. Sometimes, her lack of people skills really did bite her in the ass.
"I'm sorry, you should probably go after her. I can get myself home. Don't worry, Damon." She gave him a little smile, looking at him for a moment before she made sure she had her phone and whatever else she'd come there with. Perhaps flying home would be a bad idea. She really was wary of calling a cab, so perhaps she'd just walk home. And apologize to Elena once she was sober.