Five Iron Frenzy is an American band which formed in Denver, Colorado, in 1995. Best known for playing ska punk music characterized by an offbeat sense of humor and prominent Christian themes, Five Iron Frenzy was one of the pioneering figures of the Christian ska movement which emerged with ska's mainstream revival in the 1990s. Since 2000, the band's music has shifted away from straight ska to include and embrace stronger alternative rock and pop punk influences, though it continues to create ska music and feature Christian lyrical themes despite several members' changes in religious beliefs.

Denver is a consolidated city and county, the capital, and most populous city of the U.S. state of Colorado. Its population was 715,522 at the 2020 census, a 19.22% increase since 2010. It is the 19th-most populous city in the United States and the fifth most populous state capital. It is the principal city of the Denver–Aurora–Lakewood metropolitan statistical area, the most populous metropolitan statistical area in Colorado and the first city of the Front Range Urban Corridor.