That means only ethnic Germans, no Asians or blacks.
Access to an exclusively selected and over the years developed adequate, loyal clientele.
The men are cultured, intelligent, neat, mostly businessmen, aged from 30 to 55 years.
According to the rules, the employee is prohibited from serving customers who have not previously taken a shower or who have obvious signs of physical illness or inappropriate behavior.
If you suddenly just don't like the client, for example, with his appearance or his rude behavior, you have the right not to serve him, that is, you have complete freedom of choice and you can work for your own pleasure.