why is chapter 3 almost all about parties and why is it thrown at gatsbys house? what do the parties symbolize and what kind of people attend these parties?

Parties are a way for Fitzgerald to develop thew idea of Gatsby as a larger than lifw enigma.n this chapter, Jay Gatsby remains fundamentally a mystery. Few of the partygoers have met their host, and Gatsby stands aloof from his own celebration. He does not drink, he does not dance, he remains an observer. The man himself stands in stark contrast to the sinister gossip Nick has heard about him. Gatsby is young and handsome, with a beautiful smile that seems to radiate hope and optimism. Nick falls instantly in love with Gatsby's smile, remarking that it has "a quality of eternal reassurance in it." Gatsby's innate hopefulness is contagious. The parties represent not only Gatsby's affluence but the decadence of the Jazzage as well.

Fitzgerald gives great attention to the details of contemporary society: Gatsby's party is both a description and parody of Jazz Age decadence. It exemplifies the spirit of conspicuous consumption, and is a queer mix of the lewd and the respectable. Though catered to by butlers and serenaded by professionally trained singers, the guests are drunk, crude, and boisterous. The orchestra plays a work by Tostoff called The Jazz History of the World; though it had had a fantastic reception at Carnegie Hall, the piece is the antithesis of classical respectability.