Why does Fitzgerald give a long list of those guest who attended gatsby’s parties? How would you genraly describe these people?

Fitzgerald provides a long list, so we get a sense of the type of people who come to Gatsby's parties. There is a theme here. They are generally rich and have little interest in Gatsby himself (other than the mystery behind him). Fitzgerald generally describes them as self-absorbed and only interested in the excess of the party, "the people came like moths to the flame." Others in attendance were simply hangers on..... looking to meet and see..... or be seen.