Conversation so far:
Who were Chicago's original members?
The group now known as Chicago began on February 15, 1967, at a meeting involving Walter Parazaider, Terry Kath, Danny Seraphine, James Pankow, Lee Loughnane, and Robert Lamm.
Who did Chicago perform for first?
The band Chicago performed on a regular basis at the Whisky a Go Go nightclub in West Hollywood.

Question: When did they record their first album?
Self-contained rewrite: When did Chicago record their first album?