Well there is Girvan http://www.girvanfolkclub.co.uk/main.html which is on the coast (you get a great view of the Ailsa Craig from the harbor, and http://www.irvinefolkclub.co.uk/club.html
which is not far from the coast, but I think that is a little farther south than your planned itinerary. I'm sure you'd get a warm welcome at either one.