Correct. You can do first floor stuff just not the bar/food places on 2nd or 3rd. Maybe you can do the shop on the 2nd? but not sure... First time I checked it out Nemu and Eitaso were on the 3rd... last time I was up there Mirin was working there. I haven't been since and heard since my last visit it's hard to get up there, now it's near impossible.Hm... You could still watch the live though, since it's on the first floor?
Rather spend my time at MOGRA/Star Kebab/other places anyway... ^_^