How does Fitzgerald emphasize the mood and reinforce the theme of the Roaring Twenties?

The mood and theme of the Roaring Twenties was emphasized by using elements of the Roaring Twenties that were prevailing during that era such as speakeasies and Roaring noon.

Explanation:

Roaring twenties was the time of economic prosperity, wild youth and parties. The 1920s was an era of political, economic and social changes in America. With the rise in the economy, Americans became an affluent consumer society.

In the novel "The Great Gatsby" written by F. Scott Fitzgerald, the author had portrayed the theme of Roaring Twenties in many ways:

Speakeasies - During the Roaring Twenties period, speakeasies and other intoxicating liquor were banned by the Government. But despite the prohibition of selling and manufacturing of speakeasies, it flourished. In the novel, Gatsby was the bootleggers. When the prohibition of speakeasies was in the country, some bootleggers opened the black market to supply illegally intoxicating liquor and speakeasies. This reinforced and furthered the theme of the Roaring Twenties in the novel. The opening of the scene in the restaurant by "Roaring Noon" was another way through which Fitzgerald emphasized and reinforced the theme of the Roaring Twenties.