ON DEMAND NOW: a new “Live at the Hall” with John Sebastian, best known as founder, front man, and principal songwriter of The Lovin' Spoonful. In the Lovin’ Spoonful’s 1966 song “Nashville Cats,” Sebastian extolled the talent of the city’s musicians, and the title became a widely accepted catchphrase for Nashville studio professionals. In 2015, the Museum incorporated that title into the name of its major exhibition “Dylan, Cash, and the Nashville Cats: A New Music City.” That exhibition is new