Invite her over

"No, come over. Wait, let me open the door first." You stand up and walk over the door while you can hear her moving in the other booth. When you're about to open the door, a shiver runs down your spine. Shit, I forgot to lock the door! This could've gone really bad. You step away from the door and a few moments later the other girl enters your booth and you're finally able to see her. She must be around 20 years old with brown hair flowing down her shoulders. She's wearing a tight black shirt that made it obvious that she isn't wearing a bra and jeans hotpants with a zipper in the front at least as tight as the shirt. She closes the door behind her and locks it. She winks at you. "Now, where were we?"