When speaking about the art of rhythm, lyrics and musical scoring, never let it be said that a George Gershwin song doesn’t deliver the goods. This composition and piano delivery was the king of creation in one of the America’s most popular musical eras, ubiquitously known as Tin Pan Alley, which flourished in New York at the end of the 19th century right up to the 1930s. Gershwin’s songs were so successful throughout that era of musical theater, ragtime and ballads that they are still performed today to sold-out houses worldwide. His opera, “Porgy and Bess,” along with his jazzy “Rhapsody in Blue,” ushered in a new style of American popular music.