The Sufi ritual chanting is called Hadra.
Wadhu
They go for ritual prayers to mosque (or called Masjid). However, ritual prayers can be done at home, office, open air, during flying, in ship, or any dry clean place on the ground. For the worship of Pilgrim, this done in certain places in Saudi Arabia including Mecca.
Buratha Mosque bombing happened on 2006-04-07.
Kattankudy mosque massacre happened on 1990-08-03.
Grand Mosque Seizure happened on 1979-12-04.
Al-Nurayn Mosque happened on 2011-09-05.
Muslims perform group ritual prayers in Mosque (Masjid) and the Jews in synagogue.
Imam Abbas Mosque bombing happened on 2007-04-28.
Al-Hidaya Mosque massacre happened on 2008-04-20.
Imam Ali Mosque bombing happened on 2003-08-29.
You would recognize a mosque because it has a round thing on the top.