Last week, a group of senior citizens who attend Rev. Elizabeth Griffin’s strength training class in a former church did something that felt radical. They had class without their masks. Since the entire group was vaccinated, they could leave the masks home under new town rules. “My life is kayaking and biking and I could still do all that. But the socialization. That’s something I really missed,” said Colleen Steen, dressed in a pink workout top and celebrating her 75th birthday with hand-held weights and some deep knee bends.