I was on the Investigative Committee for a man petitioning my lodge who is Wiccan. Shortly after the interview but before I had submitted my report to the lodge, I attended a Lodge of Instruction where the DDGM presented a short talk on the responsibilities of being a sponsor and member of the Investigation Committee. During the talk, one of the more elderly men in the room stood and proudly announced that he had blackballed a man because he was Wiccan. Being in the position I was and not wanting a good man to be excluded from the Fraternity because of a misunderstanding, I rose when recognized and explained what I knew of the Wiccan belief system. Wiccans do believe in many spirits but their faith culminates with the "Lord and Lady" or "God and Goddess" who are different aspects of a singular Supreme Being.
The older man insisted that Wiccans are polytheistic and therefore cannot be made Masons. I rose again and asked the DDGM, "Would a man who worships three gods and practices ritual cannibalism during his worship service be qualified to become a Mason?" The answer was, "Of course not!"
I then said, "Then I would respectfully request that you now collect all the Christians' dues cards because looking at just the surface of Christianity, that's an accurate description. We owe every man the respect to allow him to explain his faith if we are not familiar with it."
Behind me, the presenter for the evening rose and said, "He's right! I'm a Unitarian and that's a perfect description of a Trinitarian faith." This man probably saved me as he is a very well respected Mason who was presenting the Regis Poem and the Ancient Charges.
I met with my minister who offered to come with me to any future meeting and explain Wicca and later the DDGM. The result was the DDGM, who had consulted with the Grand Master, told me that so long as the Petitioner could explain his faith in the way I had outlined including the singular Supreme Being, he would be accepted.
Lodges of Instruction are untyled meetings of Masons for education. What goes on in them is meant to be discussed.