Helen Wells, 1956.
Page about the book on the Cherry Ames site.
The book is set in New York. Tom and Cherry go “somewhere to dance”: “It was just a small place, with photographs of musicians on the walls, and a dance floor approximately the size of a postage stamp. Only two couples bothered to dance; everyone else sat listening intently to the music of the jazz quintet. Cherry found the coffee here another pleasant surprise. They served twenty different kinds of coffee, from all the countries of the world. Cherry chose Viennese coffee, a big creamy cupful heaped with whipped cream. Tom enjoyed a demitasse of black pungent Italian expresso, [sic] served with a bit of lemon peel.”