The clear advantage of sitting with one's back to the wall was that one was able to see all action within and coming into the pub, as well as to decrease the ever-present paranoia that seemed to have seeped back into Theodore's life since the nightmares. His eyes lingered to the door when a slight breeze swept the pub signalling the arrival of someone.
And someone recognizable this time, the magical world was typically a small world, which made things like this not terribly surprising. Noting that she seemed to be looking around, he gave her a slight wave, just to at least regard her presence. He wasn't sure whether she was meeting anybody, but wouldn't be surprised if she was.