The very same group that the Mamas & the Papas sang about in “Creeque Alley!” Before each musician found their way to stardom, Mama Cass & Denny Doherty teamed up with future Lovin’ Spoonful guitarist Zal Yanovsky and “Summer Rain” hit songwriter Jim Hendricks to form the Mugwumps! Only lasting eight months, this pop-folk treasure didn’t hit the shelves until after they disbanded and found success a couple of years later.