Street photography is fun when you can land expressions on people's faces! In a crowded city like Copenhagen on a Saturday afternoon/evening it isn't always so easy. You tend to get a lot of shots where people "interfere" with your composition by sticking an arm, leg or a head into your frame, but that's all part of the experience. You'll get a lot of "duds" among your keepers, and that is nothing to be too upset about. It's easier to just shoot more and look for the expression instead. If Joe Public (or whatever the Danish equivalent might be called) ends up in half your frame...no biggie!