The dhikr circle is Sufism's signature practice: the divine names repeated communally, often with regulated breath, sometimes with movement, drum, or song, continuing well past the point where the mind would ordinarily wander. Orders differ sharply — the Naqshbandi keep it silent, the Mevlevi turn, the Qadiri chant aloud — and the practice is the most common target of reformist criticism, which regards it as innovation.