1. Many people
2. People who want to play the same thing. Blows if half the lan is playing DotA the whole night and the rest can't get together enough people for a fps.
3. Good friends only
(1)friendly ppl,most gamers is friendly but u do get exceptions.
(2)a lot of ppl - the more there is the better the lan is.(rage is a good example of it.)
(3)A Decent network.(good quality hubs,cables etc..)nothing worst then suffering with a bad network at a lan.
(4)a sponsored competition is also nice if possible it brings gamers 2gether.
(5) generators for power u never know with eskom.