The world’s most super-designed data center – fit for a James Bond villain
royal.pingdom.com
royal.pingdom.com
Granted that's not the data center itself, it's in an adjacent human-friendly workspace, but even those computers can't be too wild about mist/smoke.
http://en.wikipedia.org/wiki/Indoor_air_quality
http://en.wikipedia.org/wiki/Radon#Health_Risks_and_Epidemio...
I bet they have awesome laser tag breaks.