Copenhagen: Just a little something down the streets of an unfamiliar place

There are 7 continents across the globe with 7.8 billion other people in it, 747.6 million in Europe, 5.7 million in Denmark and then there's us. There’s you and me. No matter how much I decrease the size of the area where I could meet you, what are the chances that I would find you? Is there even a chance at all?