Mr Ammiano, whose first fame had been as a performer at a homosexual comedy club he helped to found, is a rallying figure for many of the more radical elements in San Francisco.
Mr Collier had been a gunner during World War II and made his comedy debut in 1948 when a performer at Hull's Perth Street Club failed to show up and he agreed to fill in.
Following the ascent of alternative comedy in the late 1980s, the performer largely returned to his roots in stand-up, and was performing hundreds of shows a year as recently as 2008.