When I was playing festivals I most enjoyed doing the evening concerts. Folks were more relaxed and enthusiastic. I think that controlled substances, alcohol for example, helped, but the festival atmosphere relaxed the audience as well. The old adage, "The more you drink, the better we sound (and look)" holds true. I like a pint or three myself when not driving and a folk festival is a great place to catch a buzz and let the music carry you away. But I can get carried away by good music on lemonade, as well.