Folk singer and retired State University of New York communications professor Dan Berggren performed with his daughter Jenny Berggren at the Unitarian Universalist Congregation of Northern Chautauqua in Fredonia on Saturday evening. Both were in attendance for the service at the church on Sunday morning and were to perform as part of the Newton Street Irregulars 2.0 during the 1891 Fredonia Opera House’s 25th anniversary celebration.