I vaguely recall reading an article by a Swedish professor about measuring creativity in the work place. I will try to track it down. I don't recall any mention of either the magnificent seven or the double-deckers.
In the meantime, I did find a posting of 10 seeeeriously cool workplaces by Chief Happiness Officer, Alexander Kjerulf. Here are my three favourite pictures, firstly of a slide between floors at Red Bull in London:
and secondly, two pictures of the extremely unfactory-looking Volkswagen Phaeton plant, Dresden:

And Alexander Kjerulf's Chief Happiness Site is here. It is very 'happy', in that Danish Junior Senior 'Move Your Feet' way. It also has some pretty useful tidbits.
It is a little difficult to read above so try