One thing to at least think about is what happens if some less-than-cool people start hanging out there, get into a fight, etc., and then you get sued since it happened in your "store". Presumably the liability insurance will cover such things (modulo the deductible), and you'll have incorporated so they can't go after your personal checking account.... but still, it won't win points with your neighboring stores.

Especially if an incident involves minors, their parents or their lawyers will conjure up stories about how video games attract "the wrong element", and will at the very least cause a huge amount of annoyance and stress in your life...