Like have a prod server under a desk in a cubicle...
The companies internal IM system was running on a workstation with a server OS under the app managers desk for 2 years before some figured it out. Other than no one being able to use IM if something were to happen to it, it wasn't "mission critical". Luckily enough, the guy's cube was on a circuit that was tied in to the server room's UPS/Generator.
Oh, and the system was listed as Proof Of Concept. In Prod.
They do almost everything that way.