By Denny Dyroff, Entertainment Editor, The Times Hot Tuna It seems whenever Hot Tuna come to the area, there is a holiday vibe in the air. Usually, the veteran duo’s visit is a Thanksgiving week show at the Keswick Theater. This time, Hot Tuna – Jack Casady and Jorma Kaukonen – have changed it up a little bit. The two veteran musicians are performing the day after Easter at the Colonial Theatre...