Question 445: There is a group of righteous and devout people who gather at a certain time and listen to verses talking about love of Allaah and other themes. Some of those in attendance may feel ecstasy and start whirling, others may scream and cry out, and others may lose consciousness. Are these acts Makrooh (disliked) or not?
Answer: Ecstasy and Whirling are Sufi Bidd`ahs (innovations in religion). Thus, it is not permissible for Muslims to join or imitate those who practice such Bidd`ahs... read more here.