La musique de traditionalle en Bretagne

Please help. I am a Scottish musician about to go on holiday near
Carnac (June 20th). I need to find out if there is any way I can find
traditional French music that I could join in with. I play some
traditional French music but I am accomplished enough to join in and
would LOVE to do so if I get an opportunity.

Please accept my apologies for my non-existent French. I will try to
gain some knowledge before I arrive!

.