Short Answer 
Chapter Five of The Great Gatsby utilizes humor through situational irony, as Gatsby’s grand reunion with Daisy becomes awkward, highlighting the gap between expectations and reality. Additionally, Gatsby’s clumsy actions and the critique of the era’s excesses contribute to a light-hearted yet insightful commentary on human vulnerability and the absurdities of social values.
1. Situational Irony
In this chapter, the reunion of Gatsby and Daisy, which is meant to be grand and romantic, turns out to be unexpectedly awkward. Instead of a smooth encounter, Gatsby’s nervousness creates a contrast between his high expectations and the reality of the situation. This irony serves as a subtle source of humor, illustrating the imperfections in life’s most anticipated moments.
2. Character Reactions
Fitzgerald captures humor through Gatsby’s clumsy interactions, such as his fumble with a clock during his attempt to impress Daisy. These moments reveal Gatsby’s vulnerability, presenting him as endearing despite his wealth. His awkwardness helps to humanize him and adds a light-hearted element to the otherwise tense atmosphere of the reunion.
3. Social Satire
The extravagant display of Gatsby’s Mansion serves as a humorous critique of the Jazz Age’s excesses. Gatsby’s eagerness to showcase his wealth to Daisy, even when it does not aid his goal of winning her love, reflects the absurdity of the social values of the time. This social satire enriches the narrative and simultaneously provides humorous commentary on the behaviors of the wealthy elite.