Well I think business is there la. Look at SS15

Mostly students and college ppl are main customers.
With more and more games coming up I guess its still a market for it.

The thing you need to consider is whether its profitable or not cause you have to put in heavy investment to compete with existing cafe's. Else you got no egde. So the ROI is not that quick as you wish.

You need to think through and calculate and see whether its worth your investment or not.

For some cafe's the profit comes in after 2-3 yrs. So think about it carefully