For many African churches, the all-night vigil is a centerpiece of devotion and is not limited to any particular season. The event commonly begins at 9 or 10 p.m., usually on a Friday, and runs until four or five the following morning. Particularly among the independent or African-instituted churches, prayer is accompanied by acts of healing and exorcism. These services commonly draw thousands, sometimes tens of thousands of people. Night vigils also flourish among the booming evangelical and Pentecostal churches of South Korea, where hundreds of thousands pass their Friday nights in prayer and praise. In terms of timing, endurance and mass appeal, the closest Western parallels to these Christian celebrations would be found in dance clubs and rave parties in major cities.