Switcheroo
A game played infrequently by overly computerised geeks...
To play this game, you need multiple computers on a network, and multiple hubs or switches connecting the network together, all (or at least much of it) in the same small room or cabinet. The best setups can take years to accomplish.
Game play is simply to untangle the wires, while minimising loss of network connectivity. The game ends successfully when an independant observer considers that the cables are not "messy" or "jumbled". The game ends in failure if anybody using any aspect of the network complains about loss of connectivity, and the fault can be directly blamed on the game. (these people should not be aware of the gameplay to ensure fairness)
A good game can run for weeks.