A Photography you like

This photography was taken by New York City based photographer Jeff Mermelstein. The year when it was taken is not specified but it was first published in 1999, in a book named Sidewalk, compiling a series of photographs taken during the 90's.
The interesting part of this picture and the reason why I like it's the question, what does it show?
At the forefront we see a young woman wearing red sunglasses, but she is out of focus. Then we realise that the background is in focus, showing a chaotic scene, full of people and with no apparent interest. But by looking further, we see that the reflection on the red sunglasses of the young women on the foreground are also focused, showing showing a couple lonely windows in a rather classic looking building, like a scene completely unconnected scene that look more organised and simple.