In 1993 Schneider rebuilt the room u r 3, originally built in 1988, as room u r 10. The main alteration was to give the earlier room a motorised base on which it could rotate a full 360 degrees. Light and ventilation in the room were produced artificially, so that visitors would not realise that the room, and they with it, were revolving. For Schneider, the room gave rise to a repetition and intensification of his absolute uncertainty about which space he was in – the original room, indistinguishable from u r 10, or the other, rotating room that he had laboriously constructed.

Some years later, the revolving room was set up as the Coffee Room for visitors, equipped with two chairs, a simple table, and appropriate place settings. With its rotating mechanism of 360 degrees, Kaffeezimmer acquires a planet-like status and is recast as a world of its own. Along with its ventilation and illumination systems, the room exists in its own time, outside real time and place. Kaffeezimmer is the first room in Haus u r introducing conditions for social interaction. Its otherworldliness is contrasted with the trivial scenery of an everyday experience.

In a quotation capturing the ostensible dullness, the unrecognisable orbital kinetics, and the potential horror awaiting the visitor of Kaffeezimmer and Haus u r, Schneider shares his reflections: ‘Maybe someone comes in because the door was left open or they have been invited. They drink a cup of coffee with me. We have a boring conversation, they leave again, and don’t even wonder why they were there in the first place… they came and didn’t notice that they rotated once right round. Of course I can’t know what will happen. Someone might open the wrong door at the wrong moment and plunge into an abyss.’ – Ory Dessau