At the time of the live recording of "25 or 6 to 4" from the Guitar Center Sessions, Chicago was promoting their album "NOW (XXXVI)," which was released in 2014. This album marked a significant point in the band's long career, as it was their first studio album of new material in over a decade, showcasing their continued evolution in the music scene. The performance reflects Chicago's enduring popularity and ability to resonate with both longtime fans and a new generation of listeners. "25 or 6 to 4," originally released in 1970, remains one of their most iconic songs, blending jazz, rock, and pop elements that characterize the band's signature sound. The recording in Chicago, the city that shares its name with the band, adds an element of nostalgia and connection to their roots, highlighting their longstanding relationship with their hometown audience.