I can agree, and disagree with a lot of the above. I "came back" into folk clubs only in the last few years, after last going in the late sixties. Most of what you regulars would call old and hackneyed songs, I actually hear as new songs (to me !), and they are ones I will learn and play back when I do an occasional floor spot - each making their debut. However I do make a point of doing different songs at each venue, and generally not repeating anything.

The thing I find most confusing is that it tends to be the unaccompanied singers who keep repeating the same songs, as against accompanied songs where people try different songs most of the time.

Anyway a good song done badly is still a good song, a bad song will only be forgotten very quickly