A neighborhood that someone really wants to get into think of savoury as a food like "that burger is savoury" you want it to last because it's really good. So a savoury neighborhood is something that looks really nice and you want it
Explanation: When we say the phrase "savoury neighborhood" we are refering to an attractive and respectful neighborhood. The adjective "savory" or "savoury" is related to the sense of taste, however, it is commonly used to describe a district or a neighborhood in a positive way.
Um... idk where the places where placed or any of the geographical were. I was completely confused but... In east egg tom lived, in west egg (the main character) Jay Gatsby lived and in valley of ashes the wilsons lived