Pretend I'm starting out with nothing. What would I need?

Starters: Need computers. Depending on game, but at least two for the players, then any number for the spectators.

A game. Easier than doing a few. I feel that WoW would gather the most players, but you'd be forced to play online which defeats the idea of the LAN. I was a long time Counter-Strike player, but I believe you have to get in contact with Valve on a lot of their stuff. Plus I'd have to amp the max players, I'd say at least 3vs3, but the choice would be 5vs5(impossible to get the players).

The graphics on UT3 are just too powerful for most computers. UT2004 or Quake III could be a good choice. I'd amp the player physics on UT2004 of course and have to use CPMA. I hate vQ3's player physics, they suck poopie. AIR CONTROL WTF. Halo II could be interesting, the location I want has a place that runs Halo stuff. I'd love to wtfpwn them with a keyboard and mouse.

Tables. Chairs.

How do I get the computers connected? I've never did even a two computer LAN, let alone a large one.

Any suggestions? Remember, think really low tech, lol! Then we'll work our way up to the top if possible ^^