Tell the group you need to visit the restroom

You address the group as they finish pulling on their coats.

"Thanks for the great time you guys, I need to run to the bathroom though, I'll see you later."

"Oh Gabby, wait just a sec, I think we're gonna go hang out at a bar if you want to come," Melissa says as she finishes gathering her coat and purse.

Your heart leaps at this great opportunity to get to know the others a little better.