How Many More Times by Led Zeppelin
How Many More Times by Led Zeppelin (1969). Wikipedia article here.
It consists of several smaller sections held together by a bolero rhythm that pushes the piece along. At the end, the song pans between the left and right channels. Elements of this song are faintly reminiscent of previously-recorded instrumental "Beck's Bolero" by Jeff Beck" - from Wikipedia article
The Boléro piece starts at the 3:10 mark.