This whole thing here seems to me to illustrate quite well the difference between "folk" and "folkies".

If you've gone somewhere to listen to interesting songs, I can understand why you wouldn't want to listen to the same person sing the same song week in and week out. A good folk club will be the place for you. Some singers nights, some guests. Excellent.

If you've gone somewhere to make music as part of a village or other neighbourhood community, then you'll be more than happy if Charlotte brings her flute every time and plays "Amazing Grace" because that's all she can confidently play (though you might encourage her to learn a 2nd and a 3rd tune for her own satisfaction) or if Keith sings "Old Shep" again (though you might complain for effect so that the whole pub joins you and him in having a good laugh).

;-)
Ian