Yeah, Genie, I do pretty much the same thing on "Sinner Man." I learned it from one of Guy Carawan's Folkways Records, and that's the way he did it. Including switching from the melody to singing a high harmony line on the last couple of verses and going full blast! (Ending a performance with that is a great way to milk an audience for a couple of encores!)

Sometimes I'll vary the way I do a song, depending on circumstances.

For example, "The Old Settler's Song" (or "Acres of Clams," which Ivar Haglund used as a theme song for his 1940s radio program before he set his guitar aside and started opening seafood restaurants all around the Seattle area) runs nine verses. It repeats the last line of each verse twice, then the next to the last line, and the last line again. This essentially doubles the length of each versed and makes for a pretty long and repetitive song.

If I'm doing it as a solo, I sing just the four line verses without any repeats, until I get to the last verse, then do the repeats to wind off the song:

No longer the slave of ambition,
I laugh at the world and it's shams
As I think of my happy condition
Surrounded by acres of clams
Surrounded by acres of clams
Surrounded by acres of clams
As I think of my happy condition
Surrounded by acres of clams.

But if there are a whole bunch of people champing at the bit to sing along on choruses, I'll sing the whole shebang.

Don Firth