The text of "The Great Gatsby" implies that all kinds of people came to his parties when it says, "men and girls came and went like moths among the whisperings and the champagne and the stars." Many of his guests were the newly rich and not always an upstanding crowd.
The fictional Gatsby parties were inspired by real parties F. Scott Fitzgerald attended while visiting Long Island's north shore. Jay Gatsby's main obsession was winning back a young debutante named Daisy, whom he met as a soldier. Daisy married into wealth, and Gatsby determined to become the image of wealth to win her back. Fitzgerald also fell in love with a woman while he was a soldier. Her name was Zelda, and she later married into wealth just as Daisy did.