Mumbai has one of the world's largest collections of art deco architecture. This includes apartment blocks, offices, cinemas and hotels built from the early 1930's until the beginning of the 1950's. The style lasted a little longer here than in many other countries. In recent years, interest in these buildings has grown, in no small part due to the excellent work of Art Deco Mumbai - an organisation devoted to documenting, promoting and where possible, protecting this part of the city's…