Unitarian Universalism draws from any and (almost) all faith practices (although it initially was developed out of Protestant Christianity). Many self-identified pagans attend UU services because of the way any faith traditions are accepted/celebrated. From a UU website, "Whether we're sitting in Zen Buddhist meditation, listening for truth with Christian lectio divina, praying to the spirit of life, or chanting in a circle at winter solstice, our spirituality is unbounded." I would guess that the "church" mentioned in this article is inspired by UU, but not officially affiliated with it.