How does F. Scott Fitzgerald’s story, “The Great Gatsby” describe or depict the lifestyle and culture of some individuals during the 1920s?

The noveau riche that populate Gatsby's parties are the epitome of the vapid pursuit of material wealth. Despite the opulence and grandeur of Gatsby's legendary swarays, nobody seems particularly happy. This goes for Gatsby as well. He sits alone like a third person watching and pining after a girl (Daisy) that is more illusion than anything else. This was supposed to be the American Dream but underneath it was rotten to its core.