We used to force Nellie Dean fit the Marine's Hymn.

There's an old mill by the Stre-e-e-eem
Nellie Dean, Nellie Dean, Nellie Dean
Where we used to sit and dre-e-e-eem
Nellie Dean, Nellie Dean, Nellie Dean
and the waters as they flow-ow-ow
seem to murmur soft and low-ow-ow-ow
you're my heart's des-ire, I-I love you so-o
Nellie Dean, Nellie Dean, Nellie Dean

I also remember years ago you could get Square Dance records which consisted of just chord arrangements which could be used for many different singing calls.