Google software engineer Kenton Varda has a pretty great house. Not because it's all clean and new and rather large, but because it's been built specifically with LAN parties in mind.
The house has twelve "fold-out computer stations", with six each in two rooms (for team play!), and which normally just look like monitors placed in a wall. Move some wood panelling, though, and they transform into little PC gaming stations, each packing the following hardware:
CPU: Intel Core i5-2500
GPU: MSI N560GTX (nVidia GeForce 560)
Motherboard: MSI P67A-C43 (Intel P67 chipset)
RAM: 8GB (2x4GB DDR3-1333)
Monitor: ASUS VE278Q (27" 1080p)
The stations all run off a network, so he doesn't have to tinker with each individually, and even have security that can send images to his phone when he's out of the house.
In addition to the PCs, he's also got two big flat-screen TVs with "a selection of game consoles attached", but people are in a PC state of mind "we usually end up streaming pro starcraft matches to these".