In the late 1950s, Clancy with his brothers and Makem began to take singing more seriously as a permanent career, and soon they recorded their second album, "Come Fill Your Glass with Us". This album proved to be more successful than their debut album, and they began receiving job offers as singers at important nightclubs, including the Gate of Horn in Chicago and the Blue Angel in New York City. The group garnered nationwide fame in the United States after an appearance on "The Ed Sullivan Show", which led to a contract with Columbia Records in 1961.