There is a "Grey School Of Wizardry" in Sonoma,California

The Grey School of Wizardry is a school specializing in occult magic, operating primarily online and as a non-profit educational institution in the State of California. It was founded by present headmaster Oberon Zell-Ravenheart, a founder of the Church of All Worlds. The school was reported to be "the first wizard school to be officially recognized as an academic establishment."[1] It is a secular institution, not a religious one, and is not affiliated with any religion or religious organization. Over 450 classes are offered in 16 magical departments. In reference to the traditional title journeyman signifying one who has completed an apprenticeship, graduates are certified as “Journeyman Wizards”. @Curionic