I don't want to be discouraging, but around here they go out of business as fast as they go up. There is, in fact, a P4 1.8 Ghz Dell 4400 sitting not 5 feet away from me right now purchased for $200 when the last one went under.

You may be able to make some money off of LAN parties if you put good switches in and have the hardware to handle the games. Not having broadband seriously limits the amount of surfing that people are going to do.

I'd focus on making it as technology friendly as a place as possible. MathGirls suggestions were excellent.