I live in a small/medium sized town in Norway and I'm (like many others I guess) seriously considering an cybercafe/netcafe/etc. There are no competition whatsoever, and lots of potentional customers (cs-kids generally), so I actually believe it can go around.

Obvious target: gamers.
Reason for them to visit my place: no other places to go if they want to get that "lan-feeling".
Setup: 1 server (web, mail, management), 15 clients (as a start).

But anyway. Not beeing a gamer myself I have no idea how these game-licenses work. I know you can get a single-license by going to a store and getting a copy of the game, but how am I supposed to do it if I want these games installed on 15 computers?
Anarchy Online
Battlefield 1942
Battlefield 1942 - Desert Combat
Battlefield 1942 - Eve of Destruction
Battlefield 1942 - Silent Heroes
Battlefield - Vietnam
Command & Conqueror - Generals
Command & Conqueror - Generals Zero Hour
Civilization III
Deus Ex 2
Everquest
Farcry
GTA III
Gunbound
Half-Life
Half-Life - Counterstrike
Half-Life - Day og defeat
Half-Life - Richochet
Half-Life - Natural Selection
Half-Life - Steam
Heroes of Might & Magic IV
Star Wars - Knights of the Old Republic
Lord of the Rings - Return of the King
Max Payne 2
Master of Orion 3
Neverwinter Nights
Prince of Persia Sands of Time
Quake 3 Arena
Simpsons Hit`n Run
Star Wars Jedi Knight 2
Starcraft - Broodwars
The Sims
Unreal 2 XMP
Unreal Tournament
Unreal Tournament 2004
Warcraft 3 - Frozen Throne
Wolfenstein - Enemy Territory
Worms 3D
Worms World Party
(stole the list from some other cafe's site)