This was filmed at the Arie Crown Theater in Chicago, IL in November of 1972. Chicago performed an entire week of sold out performances at the ACT.

This was filmed on January 20, 1979 at the Sportsground in Sydney, Australia. "25 or 6 to 4" is a song written by Robert Lamm for the rock band Chicag This was filmed on January 20, 1979 at the Sportsground in Sydney, Australia. "25 or 6 to 4" is a song written by Robert Lamm for the rock band Chicago. It was recorded for their second album Chicago (1970) with Peter Cetera on lead vocals. This recording features an electric guitar solo using a wah-wah pedal by Chicago guitarist Terry Kath. Lamm himself says that the title is "just a reference to the time of day," and that "the song is about writing a song. It`s not mystical."[2] The time of day in reference is 3:35 AM (or 3:34 AM), which would then be 25 (or 26) minutes to 4 AM. more >> <<less