which took up organizing musical life after the suspension of philharmonic and opera activities. The organization was headed by Franciszek Groër, professor at the Jan Kazimierz University Medical Faculty, with composers Adam Sołtys and Tadeusz Majerski in the management. The Gazeta Lwowska reported in October 1931 that Koffler was also on the board, though his name no longer appeared in the Society's brochure printed at the end of that year. Nevertheless, in 1932 he served on the jury of the Society's singing competition.

The Society of Music and Opera Lovers made its mark in Lwów's musical history by organizing Maurice Ravel's prestigious concert in March 1932 at the Grand Theater. Pianist Marguerite Long performed the Piano Concerto in G Major, just two months after its Paris premiere, and the programme also featured Boléro op. 19. A month later, at the PTM hall, Koffler's Variations for orchestra op. 9a was performed under Adam Dołżycki's baton, who also presented fragments of his opera The Teutonic Knights.

In March 1939, the Friends of Music Society, in collaboration with the Polish Radio station in Lwów, organized a Bach concert at the Municipal Casino. The radio's chamber orchestra performed under the direction of Jerzy Kołaczkowski, with Józef Koffler delivering an introductory lecture. In April 1939, during the "Chamber Evening of Contemporary Music," an unidentified composition by Koffler (presumably for piano) was performed alongside works by Tadeusz Majerski, Paul Hindemith, and Igor Stravinsky. The performers included one of Gabriela Sołtys's sisters (wife of Adam Sołtys) – either Maria (violinist) or Waleria (singer) Jędrzejewska – and Jewish musicians: violinist Marceli Horowitz and pianists Fryderyk Portnoj (former student of Leopold Münzer) and Stanisława Goldhammer.