The more elderly among us will remember when lead guitarist Randy Bachman found religion, and his fellow The Guess Who band members just about swallowed and choked on their bongs and whiskey shot glasses in astonishment. They dis-invited him from the group and promptly disintegrated (even more than Burton Cummings' singing, Bachman's tasteful and hard-melodic chops were the glue that held The Guess Who together).
Bachman had a resurgence with Bachman-Turner Overdrive a few years later, but The Guess Who never did recover.