Summer Angel - Quite a few were blatant hymn rip offs
As far as the pink songbook and the green songbook before the pink one, that's not much of a secret. That's why,for the old timers here who remember #1 from the green songbook "Hail Him" they kind of let that one go, I remember when we sang that one back in the 60's, that one was almost like a Baptist Church hymn that had folks running up and down the aisles speaking in tongues, it got you going.
As far as the other songs, "from house to house, from door to door" I remember the melody and those words, I remember #19,the Hawaiian song. Take Sides with Jehovah seemed to be a popular one. Keep your eyes on the prize. Since I was a born in and a child when these songs were sung of course I remember the melodies and a few of the words.