Just like the title suggests, the crime takes place in a hotel in Mayfair. Mayfair is an affluent area in the West End of London towards the east edge of Hyde Park, in the City of Westminster. The district is mainly commercial, with many former homes converted into offices for major corporate headquarters, embassies, as well as hedge funds and real estate businesses. There remains a substantial quantity of residential property as well as some upmarket shops and restaurants, as well as London’s largest concentration of five star hotels. Rents are among the highest in London and the world.