I went on August 26 at 8:00 pm. I heard from a friend that this restaurant had a Groupon, so I figured i'd tried it out. As soon as I got their I showed the server my Groupon and to my surprise she immediately changed her attitude from ok to extremely rude. The last time I saw her was when she dropped off the check. She was not quite attentive. I left with a bitter taste in my mouth. I was hoping to get treated better since I am a local seeing as though I am able to recommend Koi to both locals and tourists since I work on The Strip. Based on my experience I DO NOT recommend this place if you have a Groupon. If customer service is not valued then go for it the food is great!