I think it is supposed to be ironic...
Now evening, a choir in the orchestra pit begins to sing “Blessed Be the Tie That Binds.” The choir, directed by the bitter yet comical choirmaster Simon Stimson, continues to sing as George and Emily talk to each other through their open windows. Mrs. Webb, Mrs. Gibbs, and their gossipy friend Mrs. Soames return home from choir practice and chat about the choirmaster’s alcoholism. The women return to their respective homes. George and his sister Rebecca sit at a window and look outside. Rebecca ponders the position of Grover’s Corners within the vastness of the universe, which she believes is contained within “the Mind of God.” Night has fallen on Grover’s Corners, and the first act comes to an end.