Mayfair is a place in London, England in the City of Westminster, named after the fortnight-long May Fair that took place there from 1686 until its was banned in that location in 1764. Prior to 1686, the May Fair was held in the Haymarket[?], and after 1764, it moved to Fair Field in Bow.
... out with 30.3% under the age of 18, 8.1% from 18 to 24, 29.9% from 25 to 44, 23.8% from 45 to 64, and 7.9% who are 65 years of age or older. The median age is 35 ...