Franz Nicolay is an American musician and writer. He is best known for playing the accordion and piano in The World/Inferno Friendship Society and keyboards in The Hold Steady from 2005 to 2010 and again from 2016 onwards. He is also notable for founding Anti-Social Music, a composer/performer collective based in New York City, and for performing in the Balkan jazz quartet Guignol.

The World/Inferno Friendship Society was an American band from Brooklyn, New York. Its style merged punk, soul, klezmer and jazz, while its collective membership featured horns, piano and guitar and had a membership of about 40 players, of whom only about seven to ten active members usually performed at a time. The group was led by singer Jack Terricloth, who was the only constant during the group's history. Terricloth was known for his pointed commentary during shows; his monologues touched on politics and his transformation from the "old school."