Open a gaming center for PC's 
Avoid valve games since they usually charge a monthly fee/pc
Battlefield 2 and Warcraft will draw in a lot of the crowds.
Or you can go in for the MMORPG approach. WOW, EverQuest, City Of Heroes etc ..
I dont think you will have to worry about console games licensing in PuertoRico.
Wii will draw a lot of the crowd considering the motion controls. Organize Wii Sports tournaments .
Heeeeyyyy!!!! <Snap>







