I've never eaten at Koi, but they deserve one star for the terrible New Years Eve party they threw this year.
They oversold their $80 tickets and the "open bar" was a 40 minute wait for a drink, if you have boobs, which I don't.
It was absolutely so miserable that we left and spent time on the crowded dirty-ass Strip instead. But before we left, I went down to the casino floor to grab a drink, and the bouncer gave me a bunch of crap and wouldn't let me take it in, even though they were not actually selling alcohol inside (but giving it away at the "open bar") and knowing full well that the bar wait was at least 40 minutes. I still had a good time partying with my friends, but this place had ABSOLUTELY NOTHING to do with that enjoyment.
Shame on you Koi, shame!