Husband-and-wife country Blues band Delaney & Bonnie lasted only as long as the marriage, dissolving in the early 70's. Eric Clapton, in one of his many associations, played with the band at this concert. N.Y. Rock & Roll Ensemble, a group of classically-trained musicians, had recently begun to offer their fare of classical instruments playing rock music/rock instruments playing classical music.
During his Fillmore era, from 1969-1971, Singer created more posters for Graham than any other artist. Singer's posters are notable for his use of collage, incorporating thousands of images clipped from magazines spanning several decades. He developed a format that included a stunning variety of lettering styles, applying them in close relation to the theme or subject of a poster.