What is the importance of Montmartre in the novel, Nights When Nothing Happened?

Montmartre is a neighborhood near Huntington Villa where Elsie's family lives and where Liang attends a poker game at his friend Jerry's house in Chapter Four. As Liang walks home drunk from the game, the narrator explains, "Jerry's neighborhood sported houses with advantages over Liang's that were apparent only to those who lived in either community: barely wider driveways, more numerous balconies, a suggestion of larger space between houses" (116). This suggests that Liang feels slightly jealous of the people who live in Montmartre, and this subtle bitterness may be a factor in his later assault of Elsie's father.