After the Halifax group broke up, Doherty and Yanovsky formed The Mugwumps with Cass Elliot and John Sebastian.
The lyrics of the song mention, directly or indirectly, many artists and bands who were part of the music scene at the time including the other two members of The Mamas & the Papas - Cass Elliot and Denny Doherty, earlier aka The Mugwumps; plus Zal Yanovsky and John Sebastian (of The Lovin' Spoonful), Roger McGuinn (of The Byrds), and Barry McGuire (of The New Christy Minstrels).
The two joined Cass Elliot in the Mugwumps, a group made famous by Doherty's & Cass's later group the Mamas & the Papas in the song "Creeque Alley".