I've met plenty of Murid. Usually, Muslims who are interested in the Sufi Way, or are searching for enlightenment will meet with a Mushid and learn from him for however long they wish. So I've run into plenty of Muslims who were travelling the path for a while. As for Dervishes, they are hard to come by as most will be found in impoverished areas, where they've taken vows of poverty and solemnity. There are also Dervishes commonplace in Turkey, where an Order of Sufi perform a ceremony called a Sema - where part of it is dancing in a fevered circle. Those people are commonly known as "Whirling Dervishes". My Order doesn't do that, but we do have Dervishes who either live lives of selected poverty, or take residence at a place of retreat.