Snobbery is one of the ways people reveal their own lack of self-esteem.
Snobbery has the virtue of protecting a person of discernment from the base and vulgar. Certain hostesses owe their exceptional situation purely to their rigour. It is not because of their long name or wealth, but rather because they receive almost no one that it is such a privilege to be received by them.
If snobbery were a mortal sin, we would all burn in hell.