Delight Zone, which is an arcade opened up in 2001 or so (and I thing it is a decent place), but the few times I was able to go there in 2001 it was rather empty.
Arcades are for children. Children don't have lots of money. Those that have lots of money (rich parents) also have game consoles at home, with games that are far better than arcade games. And the arcade is probably overpriced. When a business fails, don't blame the customers. Don't blame Port harcourt. Blame the entrepreneur who didn't do his homework well.
If you are able to get your hands on the latest Hollywood movies and screen them at affordable prices, you'll probably succeed. If you decide to show 1980 movies and charge 5000 naira per seat, it will fail regardless of where the theater is located. Personally, I think it's a risky venture because it can't be easy for a Nigerian company to get distribution rights to the latest Hollywood movies the way Silverbird Cinemas does.
Personally, I would rather run a movie theater screening
quality Nigerian movies hand-picked by a good movie critic. I won't have to charge 1500 naira per seat to make back the cost of those movies, unlike Hollywood movies. I'd charge 500 naira per seat in any major city except Lagos.