One thing about the Viennese intelligentsia: they were close-knit group and mixed practitioners and theorists from many disciplines. Adele's salon is an example of this interaction among the arts and political life in Vienna:
"Among the prominent guests in her salon were the composers Gustav Mahler (1860–1911) and Richard Strauss (1864–1949), Alma Mahler-Werfel (1879–1964), the authors Stefan Zweig (1881–1942) and Jakob Wassermann (1873–1934), artists from the circle of Gustav Klimt, actors from the Burgtheater, and after WWI, the Socialists Karl Renner (1870–1950) and Julius Tandler (1869–1936)." (See this article.)
Note: Klimt painted two portraits of Adele;
the earlier one accompanied my post yesterday,
and the second is above.