WIKIPEDIA:

“ The Chad Mitchell Trio – also known as the Mitchell Trio – were a North American vocal group who became known during the 1960s. They performed folk songs, some of which were traditionally passed down and some of their own compositions. Unlike many fellow folk music groups, none of the trio played instruments. They became popular in some quarters, and were particularly notable for performing satirical songs that criticized current events during the turmoil in the United States during the cold war and a time of unrest brought about the civil rights movements and the Vietnam War, unlike the typical folk music and singer-songwriter musicians of their time.

History
The original group was formed by Gonzaga University students and Glee Club members Chad Mitchell (from Spokane, Washington); Mike Kobluk (from Trail, British Columbia, Canada); and Mike Pugh (from Pasco, Washington). They were encouraged by Spokane, Washington Catholic priest Reinard W. Beaver, who invited the three to travel with him to New York City in the summer of 1959 and to try performing in the burgeoning folk-music scene.
The key people that helped the trio get going were musical arranger Milton Okun and star performer/singer Harry Belafonte. Okun provided a professional polish to [......] ”

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