One of the greatest singers of traditional songs that I ever met was the late, great Bert Lloyd. Bert was clean shaven (although he did have luxurious eyebrows!). I seem to remember that he usually wore a suit and tie and looked a bit like a bank manager. I don't remember if he closed his eyes or not or what he drank - all I can really remember is the vivid pictures he painted through his singing - that's the important thing!