give examples of how the guests spread rumors about gatsby's background, and how they demonstrate towards him just so they can indulge in the pleasures he provide

Gatsby's mansion is packed with revelers when Nick arrives. Very few of them seem to be invited guests, and even fewer have met Gatsby face to face. It is a very mixed crowd: East Eggers rub elbows with West Eggers, and people from New York high society meet those from "the wrong side of the tracks." Nick runs into Jordan Baker, who is even more casually bitter than usual because she has recently lost a golf tournament. All around them, people gossip about their mysterious host. They speculate that he once killed a man in cold blood or that he was a spy for Germany during World War I.