Medley of different covers as one title

[Kid_Devine]

@jerry1970

Or should Good Ol’ Rock And Roll be added as a work as well?

Probably, yes. Especially if as you said they performed it several times. You can use the work-work "medley relationship to link the original works.
This thread is relevant:

Question: Approach for medleys

Since there is a “{work} is a medley of {work1}, {work2}…” relationship, I assume there are situations where the medley itself needs a work entity to be created. But there’s also a “{recording} is a medley including a recording of {work1}, {work2}…” relationship. So when do I need to create a medley work, and when is it good enough to link a medley recording with the works it includes?