The area outside the building and the Salvadorian bistro are also upper class, we assume, because the bistro has restrictions "Does not take reservations"

Then he crosses Houston "I wave them off, then cross Housten, dodging other limos leaving the party, and starting moving uptown (Still upper-class). Walking along Broadway." This shows that he is moving from area to area, but that the setting remains upper-class to upper middle class. 

 

He moves towards a lower class area, "Antique district", foreigners and drugs. Street lamp burns out, it becomes dim and creepy, "Someone in a Jean-Paul Gaultier topcoat takes a piss in an alleyway." Gross, and dirty area. "Bags of frozen garbage." - west village Chrysler Building. "The bum" area where homeless people are. "Cold, hungry, dirty" Whereas the party is glamourous and full of light. Less and less mention of brands and glamour and more and more about stench and sounds what about the clothes he finds disgusting. 

 

Mc. Donald's This is cheap food, cheap quality, fat, unclean? Place were upperclass people usually do not come. He is a contrast to this setting. Goes there to maybe honour Al, do things his way.