You were at Jo's bar with Callie, Mark, Erica and Addison. After a bit Mark asks if any of you want to dance and Callie was the only one to agree, because that morning Addison pointed out to her how she and Erica looked like a couple so Callie was trying to prove that she was strainght. she got up and danced with Mark while Erica stared at her, taking a sip of her wine and Addison shot her a knowing look even if Erica was looking at Callie, not Addison.