Business manager, accountant and music executive Allen Kleindied in Manhattan yesterday. He was encouraged by Don Kirshner to get into the music business. He worked with The Rolling Stones, Sam Cooke and the Beatles. Combining tough New Jersey street smarts and tenacity, he was able to negotiate better than average royalty deals for his clients. John Belushi famously and fictionally portrayed Allen as Ron Decline in the The Rutles, All You Need Is Cash.