I was using a coworker's computer a few times while he was out on vacation. Instead of wasting the constant travel time, rolling my chair from half of one side of the room to the other, I built a colony on the desktop to stay at. It was a fine Utopian city, with no strangers. We had a working monorail inside the dome, Dental plan, and a lovely bacon festival every third Tuesday. Things were good.
Then my friend came back from vacation, and sadly, retook the colony.