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Nick spends most of chapter three at another elaborately presented party at Gatsby's mansion. He "had actually been invited" to the party, a somewhat unusual event, since most of the guests were not formally invited but "came for the party with a simplicity of heart thata was its own ticket of admission."
Nick and Jordan Baker gossip with a pair of young women, speculating about Gatsby's past, and talk with "a stout, middle-aged man, with enormous owl-eyed spectacles" in Gatsby's library before Nick unwittingly begins a conversation with another gentleman who eventually identifies himself as being Jay Gatsby.
As Nick leaves Gatsby's mansion to walk home, Nick again encounters the man from Gatsby's library. The man had been attempting to depart the party when the car in which he had been riding had been in an accident, and a group of late party-leavers and chauffeurs were involved in making comments, suggestions, and accusations.
In chapter three, Nick spends time at Gatsby's elaborate parties. The chapter opens up with Nick's observation of what he sees on the weekends at Gatsby's over-the-top festivities. He observes:
The Great Gatsby
There was music from my neighbor’s house through the summer nights. In his blue gardens men and girls came and went like moths among the whisperings and the cham- pagne and the stars. At high tide in the afternoon I watched his guests diving from the tower of his raft or taking the sun on the hot sand of his beach while his two motor-boats slit the waters of the Sound, drawing aquaplanes over cat- aracts of foam. On weekends his Rolls-Royce became an omnibus, bearing parties to and from the city, between nine in the morning and long past midnight, while his sta- tion wagon scampered like a brisk yellow bug to meet all trains.
Nick feels out of place at these parties, but he is also interested. Moreover, the parties draw him in. Most importantly, he feels a fascination with Gatsby and wants to find out who he is and what he is really like. Nick gets his wish, as he meets Gatsby. The reader is also first introduced to Gatsby in this chapter.