What is the setting of A Cup of Tea: A Novel of 1917 by Amy Ephron?

The novel takes place in New York City and briefly, in France. The streets of New York are present in the text. The difference between Eleanor's reality at the boardinghouse and Rosemary's house full of flowers is quite clear.

The story takes place in 1917 during the World War I. Philip is part of the first round of American soldiers to ship out overseas for the wa