At the beginning of Chapter 3, Gatsby’s party brings 1920s wealth and glamour into full focus, showing the upper class at its most lavishly opulent. The rich, both socialites from East Egg and their coarser counterparts from West Egg, cavort without restraint. As his depiction of the differences between East Egg and West Egg shows, Fitzgerald is fascinated with the social hierarchy and mood of America in the 1920s, when a large group of industrialists, speculators, and businessmen with brand-new fortunes joined the old, aristocratic families at the top of the economic ladder. The “new rich” lack the refinement, manners, and taste of the “old rich” but long to break into the polite society of the East Eggers. In this scenario, Gatsby is again an enigma—though he lives in a garishly ostentatious West Egg mansion, East Eggers freely attend his parties. Despite the tensions between the two groups, the blend of East and West Egg creates a distinctly American mood. While the Americans at the party possess a rough vitality, the Englishmen there are set off dramatically, seeming desperate and predatory, hoping to make connections that will make them rich.
During this party, Jordan Baker, having spent most of her life in the East Egg, at some point got tired from the company she was spending time with. East Egg was the part of Long Island where old money was living. So the surroundings there were quite monotonous, leaving Jordan no choice but to crave new emotions. Furthermore, Jordan was always followed by a young man who was showing too much affection to her.