The most important detail would be that <span>the green knight visits king Arthur's court during a new years eve feast. This is the summary of the entire first half in a single sentence. After this the second part is when Gawain goes to look for the Green Knight and fulfill what he promised. </span>
The music lyrics sound good although some are not wholesome.
Answer: 1) They are definitely playing music cards in the story.
2) I have sound knowledge that it is the game like solitaire games but I have never played this game.
Explanation: The clues that lead me to think that they're playing card games are; when Karen's friends arrived at her home, she collected the cards and then after deciding, they turned the music on.