[6] They performed then regularly at the Rokoko-Diele,[6][8] the bar of the Kyffhäuser-Hotel in Kaiserstraße [de] at a time when jazz and music by Jews were banned.

When the place was patrolled they switched from American jazz numbers to German schlager such as "Du hast Glück bei den Frau'n, Bel Ami".

[8] In 1943, he also learned to play the double bass, and served as bassist from 1945 to 1948 in the Hotclub Sextet.Hotclub Sextet The broadcaster Hessischer Rundfunk aired in 1946/47 a show with him as the solo pianist.

[10] Jung had an accident in the winter 2008/09 when he attended a concert of his friend Menahem Pressler in Hamburg, and died in Rüdesheim on 22 April 2009, at the age of 88.

[3][11] His residence still serves as a location of regular jazz and chamber music concerts, organized by his son Edu and the town of Rüdesheim.