To make the festival a success, the musicians, including Albert Mangelsdorff, Wolfgang Dauner and Gerd Dudek played for reduced remuneration.

Among the jazz musicians who played at Onkel Pö were John Abercrombie, Chet Baker, Art Blakey, Carla Bley, James Booker, Joanne Brackeen, Dollar Brand, Michael Brecker, Gary Burton, Don Cherry, Chick Corea, Gil Evans, Jan Garbarek, Dizzy Gillespie, Steve Goodman, Dexter Gordon, Charlie Haden, Louis Hayes, Joe Henderson, Bobby Hutcherson, Leo Kottke, Steve Kuhn, Dave Liebman, Michael Mantler, Pat Metheny, Alphonse Mouzon, Marvin "Hannibal" Peterson, Tom Shaka, Woody Shaw, Archie Shepp, Horace Silver, Ralph Towner, Bennie Wallace, Mike Westbrook, Yōsuke Yamashita, and Attila Zoller.

The German singer Udo Lindenberg mentioned the venue in his album Alles klar auf der Andrea Doria with the lines Im Onkel Pö spielt ´ne Rentnerband seit zwanzig Jahren Dixieland... in the song Alles klar auf der Andrea Doria.

[4][3] British singer Tom Robinson mentions this establishment in his song "Atmospherics: Listen to the Radio", which was covered by Toronto's Pukka Orchestra on their self-titled debut album.

A 60-minute documentary film Eppendorf’s Cavern – The Legendary Onkel Pö (original German title Die Höhle von Eppendorf - Das legendäre Onkel Pö) was directed by Oliver Schwabe and featured in the Filmfest Hamburg in 2016.