In the 60s I saw the Polish Modern Jazz Quartet (alt, pno, bs, dms) in a Leeds club. The usual jazz audience was swelled by a number of students from the very left-leaning Leeds University of the day, who were clearly there for the politics, not the music. When a number was announced "by the American pianist, Bill Evans", the group was booed! More palatable was listening to a "conversation" at the keyboard between the pianist and my late piano-playing friend Paul Woodrow in which the only shared vocabulary was the names "Wynton Kelly" and "McCoy Tyner". International co-operation at its best with jazz as the key!