There is an ultra-fashionable set, a sporting set, a literary set, an aristocratic set, a rather 'fast' set, a theatrical set--and so on.

These may all lay claim with certain justice to membership in good society.

Their circles are to an extent exclusive, because some distinction must mark the eligibility of members.

And outside each luminous sphere hovers a multitude eager to pass the charmed circle and so acquire recognition.

Often it is hard to separate the initiate from the uninitiate, even by those most expert.