These feel a bit like surveillance shots to me. They just feel like they are there, without really having anything to draw in the viewer or make you want to keep looking. If you can reshoot, do, and try to find some really compelling compositions. At the same time, I think they would be helped out by being a touch sharper. I think you have the right idea, these look like interesting people, and I think they could make very interesting images. Can you go down and interact with them at all? Close up portraits would probably be a lot more powerful.