Hanter Dro it says

Wiki on Breton dance & link in Wiki to Breton dance music

We often dance Plinns that can change from Hanter Dro to An Dro and dances where the changes are sporadic because the musos like a larf - pilé-menu sounds like it could be one of those. And dances with three different parts where the tune informs you of the move.

But don't ask me I just wait for the music and watch others dance.