Goodreads quotes, without source, Twain as saying “A gentleman is someone  
who knows how to play the banjo and doesn't.” 
 
On Twainquotes: . . . The piano may do for love-sick girls who  lace 
themsleves to skeletons, and lunch on chalk, pickles and slate pencils. But  give 
me the banjo. Gottschalk compared to Sam Pride or Charley Rhoades, is as a  
Dashaway cocktail to a hot whisky punch. When you want genuine music -- 
music  that will come right home to you like a bad quarter, suffuse your system 
like  strychnine whisky, go right through you like Brandreth's pills, ramify 
your  whole constitution like the measles, and break out on your hide like 
the  pin-feather pimples on a picked goose, -- when you want all this, just 
smash  your piano, and invoke the glory-beaming banjo!  - "Enthusiastic  
Eloquence," San Francisco Dramatic Chronicle, 23 June 1865 
 
That sound to me like a man who enjoys listening to banjo  music.  Bob 
Stewart