It is possible, but what are the chances? I try to maximize my chances by covering all my bases.
Just like a good real estate agent, the more people you show the house to the better the chances of getting a sale from one of those people.
Just stop being calculating about it! Who cares what the chances are -- I don't know how to calculate them, and neither do you. Just leave your mind open, and treat everybody you meet as if they at least deserved a minimum of your respect. If a conversation happens, engage. If somebody drops a package, help them pick it up. If somebody asks you where you're from, tell them -- and then give them a chance and ask them where they're from in return.
Then just let it go where it goes, without pushing, and without running away. Often enough, it won't go anywhere. Sometimes, though, and you never know when, you might find something that tickles your fancy, that makes you want to ask another question, or find a way to run into one another again.
You know, when I met my love 30 years ago, I had decided that my "married life" was over -- I'd given up, and didn't want to try anymore. The only thing that allowed it to happen for me was that I just didn't reject what was happening when it was happening. It took us a while, but one day we discovered that we really liked being around each other, and then...welcome to today, 30 years later.