if you go via Plymouth then visit the Moorland Folk Club at Wotter evry Sunday. Guests fortnightly,friendly folk with Ben Campbell his guitar and songs and Graham Searly, but then he is a teacher with his poems.
odmin is the only proper 'club'in Cornwall!!
Session every Wed at Trewarmet Lodge nr Tintagel can go on till late thanks to Edwina.
Park up in Padstow and walk around the harbour, if you can then sing opposite Walkers.