As a matter of fact, mood is what brings the party to life for the audience while reading The Great Gatsby. "A sharp, joyous moment the centre of a group, and then, excited with triumph, glide on..." an example from the passage, the words 'joyous' and 'triumph' give a light-hearted mood to the passage Describing how as the night carried on, more people begin to celebrate.
In addition, the imagery used in the passage