I always liked Davis, for his singing and his impressions. I never knew he played xylophone. If I recall correctly, word was he never seemed comfortable in his own skin...you don't meet too many black Jews, but Davis found common cause. I guess folks know he was one of the Rat Pack (originated in the 40s, but became better known in the 60s with Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford, and Joey Bishop.)
I just read that he campaigned for JFK, who then asked Davis to not attend his inauguration because Davis was in an interracial relationship (with Kim Novak), and Kennedy did not want to offend southerners.