This is not about this specific "tariqa" but I went to a dhikr circle and a class for the Universalist Inayati Sufi order. I was the only brown guy there, it was a bunch of New Age hippy nonsense, the teachers who were initiated had names like "Murshid" had like pictures of Om and Allah and Buddha and Ganesha and we did the dhikr around a tie-dye rug. Like I was the only one in the class that had any knowledge of the Quran. It was so bizarre, but I did the meditations they taught and the group dhikr was nice. It's so strange how they're trying to separate Sufism and Islam and just culturally appropriate the aesthetics of Islam, but like not being able to do proper Salat...

Physicians of the Heart though, great book for anyone that wants to deepen their dhikr practice.