little question on the side... when you open up an internet cafe with computers equipped for gaming, how will you stop people from mining the coins they pay you? I mean, you're basically attracting a target group that will try this exactly.
Who cares? They're paying (the equivalent of) dollars by the hour to be there, while the mining produces pennies per hour. Sounds profitable. They're paying for the computer time, let them mine!
The owner cares. A dozen PCs mining at full speed will eat up lots of power, the hardware will deteriate much faster, and he'll get a heat problem, or some problems with his AC. We all know mining wouldnt pay the bill for the customer, but is that stopping anyone from doing it? probably not. If you open up a business like this you always have to factor things like how often are you going to buy new hardware into your rental price.
Managing the bitcoin price should be fairly easy. A fairly simple script tied into the MtGox api would be all that's needed. Check for current price every time minute (or whatever), update BTC price. When someone pays by BTC have it pay to one of your MtGox addresses, and the same time execute a sale at the transacted price (via the api). You'll always have a bit of float in BTC anyway so this acts as a buffer for the time delay of the payment clearing. As long as your float covers typical 60 minute BTC sales volume you don't take any price risk at all (well, besides your float, so good to set that up when the price is low).
the problem with this is that you'd have to agree on a price before the customer uses his computer, because we all know that even within a session of only 60 minutes the price can go up and more likely down by more than a dollar.
I had the same dream when I was 20. I wanted to start a geek computer shop annex internet cafe. I wanted to use it to give internet and PC training courses too. But that was long before internet became ubiquitous and rendered not only the internet cafe obsolete, but the geek shops too. So Ive long shelved that idea, today almost no one has a need for such a place here. Who doesnt have internet? Most have it in their pocket.
Then some 10 years ago I made a trip across Latin America. I fell in love with guatemala and I ended up talking to an internet cafe owner there that wanted to sell his business, and I was interested for a while. But then I realized that while computers and internet may not be as ubiquitous yet there as here in Europe, it was only a matter of time. Im not sure if that time has already come there, but at the very least the tourists they relied on mostly will have their smartphones and tablets with them.
Also when I look at the prices of the few internet cafe's that have not closed their doors (yet), I cant say it looks like a profitable business. Its a dying niche market IMO. You should have done it when you where 16
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Well, I'd consider such a location more as a place to meet new people. I think it's more about the playing/exchanging thoughts than renting computers. Also internet cafe's like that might be ideal for gaming sessions, special events etc, since a lot of people are still hesitant to bring their computers along for a little LAN gaming.