Since taking these office space images I've discovered the works of artist Dan Graham (USA). He uses the processes of mirroring to examine different aspects of human interaction from corporate power structures and surveillance to consumerism and social relations.
Dan Graham transformed the roof of 548 West 22nd Street into a small-scale urban park for New York's Chelsea neighbourhood. The project was accessible to the public from 1991 until 2004, when this exhibition space closed. The project included a large-scale architectural glass pavilion designed by Graham in collaboration with architects Mojdeh Baratloo and Clifton Balch. Constructed from a two-way mirrored glass, the walls of the pavilion shifted between transparent and reflective states as the intensity of light changed, creating changing and complex visual effects with the sky, surrounding landscape, and interactions with people on the roof. The project also encompassed a small shed on the roof which was converted into a cafe/video viewing room. The video program was organized around themes chosen by Graham.
More info about his art can be found at: http://en.wikipedia.org/wiki/Dan_Graham