The Great American Songbook, International Cabaret, and Bossa Nova. Introducing the listener to the material from The Golden Age of Popular Song (1920s through 1950s), Post-Golden Age (1960s through 1980s), International Cabaret, and Bossa Nova, which originated in Brazil, France, and other countries, Sonny and Perley perform in their own inimitable artistic style that incorporates elements of education, history, art, culture, intimacy, audience engagement, and artistic creativity.