Irish trad scene is unique in this regard. There are Irish trad sessions everywhere in the world (I was able to visit some in quite faraway places like Moscow, Istanbul or Santiago de Chile), and in Ireland there are a few in every village, and then some.

But that's just it, Irish trad. Frenchies have something similar with balfolk, but not so epic, and while there are other strong European folk scenes, none of them is on the scale of Irish trad. Alas.

Source: I play jigs and reels for fun.