We decided to go check out this place before the Penn & Teller show because the menu sounded descent and it didn't appear to be crowded. The food was average. There was nothing special about the food as it was bland. We didn't have reservations that night but even though there looked to be plenty of seating available we were seated at the oyster bar. The chef was our server and was extremely busy. Aside from our order being put in slow, we witnessed the head chef yelling at the chef that was waiting on us. When I called it to the manager's attention, she only made excuses on how he had poor hearing and it was part of the Asian culture to yell. Well...welcome to America! It's NOT professional or appropriate to yell at employees in front of customers. Nor is it appropriate to excuse the situation by making excuses when clearly the chef was yelling at our chef on how 15 orders were behind from across the bar. It was also unprofessional to roll your eyes as a manager at a customer when clearly the problem lies with the chef and all she should have said was that she would speak to him later. Sorry Rio if not for Penn & Teller you would be way out of business. Bad service, poor food.