Mumbai has Fifteen million people live in Mumbai- Industrialists, film-stars, artists, workers, teachers and clerks- all living cheek-by-jowl in soaring skyscrapers and sprawling slums. They come from diverse ethnic backgrounds and speak over a dozen tongues, adding color, flavor and texture to the Great Mumbai melting pot. Mumbai is a city that never sleeps!. If you are visiting on business or holiday, there are lots of things to do and see.