Chinatown. The corner of Jack's mouth quirks up for a second, good memories, from here and abroad, protecting the British Empire's- uh, colonial concerns.

Oh, they're being followed? Awe-some. "Be right back." Jack is banking on his ability to blend in better than the rest of them to fade back from the group, maybe get closer to whoever is following them, or get them to make a move if he notices that the group looks like they're splitting up.