The Null Device
The top three cities are New York, London and Tokyo, with Paris and Hong Kong following. Other notable entries: Sydney at #9 (the only Australian city on the list; New Zealand, meanwhile, doesn't rate), Brussels is at #11, San Francisco at #12 (largely, if the caption on the photo is to be believed, for its role in the non-heterosexual world), Toronto at #14, Berlin at #16, Stockholm at #23 (perhaps largely due to Sweden's position as a pop superpower), Zürich at #24, Rome at #28 (presumably that includes Vatican City), and Copenhagen at #37. Dubai leads the Middle East at #27 (the global economic crisis hasn't kicked it off the list, it would seem), ahead of Cairo (#43) and Tel Aviv (#50). Meanwhile, the leading South American city is Buenos Aires (#22), ahead of Sao Paulo (#35), Rio de Janeiro (#49) and Bogota (54).
(Reading suggestion: scroll down the photo essay slowly, and try to guess the city before revealing the caption.)