Tønder Festival celebrates its 50th anniversary this year with many of the musicians who have played at the festival through the years. One of them is blues and roots guitarist and singer Hans Theessink, who is well known to seasoned festival guests. Hans Theessink has a large following in Denmark and has played at Tønder Festival since 1976. Solo, with tuba player Jon Sass, or guitarist and singer Terry Evans, or guitarist Knud Møller or with the band Blue Groove. This summer, it is Blue Groove who are back together and touring Europe. Hans Theessink & Blue Groove were very popular in the 80s and 90s. They took a break in 2000 to pursue other projects. In 2018, they reunited to celebrate Hans Theessink's 70th birthday with a concert. The idea to reform the band came up, and now you can look forward to seeing and hearing them. Blue Groove consists of Jon Sass, tuba; Ali Thelfa, percussion, vocal; Doretta Carter, vocal and Etta Scollo, vocal. Hans Theessink was born in the Netherlands in 1948, lived in Denmark in the 70s, and is today a resident of Vienna.