What is the importance of Enzo's Restaurant in the novel, Mister Monkey?

Enzo’s restaurant has different significance for different characters. For Sonya, the location is the setting for a disastrous date which occurred after a particularly unpleasant and stressful day at work, marking the place as negative. For Ray, by contrast, the location is a place of indulgence and luxury where he goes to make himself feel better about how much her hates Mister Monkey the Musical by spending the royalties on an expensive meal. For Mario, the restaurant provides him with access to theater tickets that have a positive influence on his life, but also provides him with examples of unpleasant people who make him angry and jealous.