- Chad Mitchell Trio
- Glenn Yarbrough
- The Serendipity Singers
- The Brothers Four
- Ian & Sylvia
- The Limeliters
- Pete Seeger, Bess Hawes, Woody Guthrie, Burl Ives, Studio Chorus, Union Boys, Holly Wood, Dock Reese, Lou Kleinman, Lee Hays, Butch Hawes, Fred Hellerman, Ronnie Gilbert & Weavers, The