Iconoclastic bluesman Richard Johnston is, in a way, responsible for the Southern Comfort Blues Shack being introduced at this year’s Beale Street Music Festival. Last year, the one-man band who plays anywhere he can around town, found a spot at Tom Lee Park during the 2007 festival and did his thing. Memphis in May didn’t get mad, it got creative and put up the SoCo shack to provide music between sets at the Tennessee Lottery Blues Tent.