Liam and Molly
Officially, Molly had come along with Steve. That's what she let him think anyway. He'd said that he and Veronica were going, asked if she wanted to go along, and she'd said yes and immediately texted Liam to tell him to meet her their. And then made noises about how gross her adults were and escaped quickly.
It was easy to make sure Liam was where they'd said they were going to meet before she even got there, pinpointing where he was and slipping through crowds to where he was standing, running right up and looping her arm through his.