Pretty interesting concept. I've seen Wii's work quite successfully in bars, but I've never seen a full-on gaming bar.
I'd certainly give the place a go, but before I made it a regular watering hole I'd want to know a few things. What drinks are available? What do the drinks cost? What sort of facilities are available? But most importantly, does the place have a good atmosphere? I don't mind paying over the odds for a night out in a nice bar with decent drinks and the prospect of gaming. I'd be less inclined to spend any time in some rat-hole of an overpriced trendy wine bar.