I've traveled a great deal for work and have been a part of many restaurant openings. I have frequented Lavo, Las Vegas, Nv. about 10 or more times.
On half of those occasions I witnessed staff treating patrons as "second class" to other staff members. One instance I witnessed a girl had fallen down their step stairs in the club. They escorted her out, accused her of being drunk and banned her.
In the restaurant one evening a patron was leaving when he was run into by someone running down the stairs. I heard the patron say as he pushed him off, "Watch where you're going." A fair response. The other person took an aggressive stance and threatened the patron. As it turns out the other person was an employee.
I have never cared for the attitude at a business that the customer is there for the benefit of the employee.