It would have to be something marketed to teens and adults. Like others have said, I think fighting games would do well. So would beat em ups. I think anything with a focus on multiple players would do good. It would also have to be an experience. So a place where you can eat and take a date. Not so much like Dave and Busters, but more like a local bar that has good food. Something like the former Way Station in Brooklyn, or My Parent's Basement in Georgia. Something with quiz night, movie nights, fighting game competitions. They couldn't be like how they were before, simply because of the fact that arcades are were you got the most powerful good looking games. That's not the case anymore. So there would have to be a focus on the social aspect that gets people out of the house.