(1) another term for folksy or folkish;
(2) A devotee of folk music.
It will depend on the context.
Some people are not folk music lovers; maybe they will face it in a different way.
However, if you want to emphasize how they were nice to you, you should say friendly
I believe folksy
is not very common, anyway.
I hope I've helped.
(1) Collins Online Dictionary.
(2) Merriam-webster Dictionary.