Last week, when DCist met with Michael Janis at the Washington Glass School, the studio was abuzz with artists working. Janis’ colleagues Tim Tate and Erwin Timmers were there working on their own projects, and the team was preparing for several upcoming events: this Saturday’s Gateway Arts District Open Studios, the many glass events at Artomatic, and the June 4 grand opening of their public art project at Ballston Liberty Plaza, as well as their…