Some of the differences that mark Alevis from mainstream Muslims are the use of cemevi halls rather than mosques; worship ceremonies that feature music and dancing, and where both women and men participate; non-observance of the five daily salat prayers and prostrations (they only bow twice in the presence of their spiritual leader), Ramadan, and the Hajj (considering true pilgrimage to be an internal one).[1] Alevis have some links with Twelver Shia Islam (such as importance of the Ahl al-Bayt, the day of Ashura, the Mourning of Muharram, commemorating Karbala), but do not follow taqlid towards a Marja' "source of emulation". Some practices of the Alevis are based on Sufi elements of the Bektashi[4] tariqa.[10][11]