 Both Cass Elliot of the Mamas & the Papas and Keith Moon of the Who died in the flat within four years of each other, each aged 32.1 Curzon Street is a modern office building.The fifth floor was home to AIG Financial Products, the division that "nearly destroyed" the US insurance company and has been described by reporter Peter Koenig as the "epicenter" of the global financial crisis of 2008.