How do Internet Cafes make money?

I was thinking of opening up a Business and I am quite handy with computer and I think this would be a really neat idea, one thing I don’t understand though is how do they make money? Would it only work in a big city type area?

you can improve your computer skill first then be confident first to do the work then you can start a new business and you can do the business in small city or big city where you can feel comfortable there you can do the business you can make money any business but you have to do your best. and giving full satisfaction to the customer and offering a new facilities to the customer so you can earn money and name as well .