Between games, sitting on the davenport, Babbitt spoke to her with the requisite gallantry, that sonorous Floral Heights gallantry which is not flirtation but a terrified flight from it: "You’re looking like a new soda-fountain to night, Louetta."
There are no more uses of "requisite" in the book.
Show samples from other sources
a place where the requisites of water, food, and shelter can be obtained
To disagree with three-fourths of the British public is one of the first requisites of sanity.