Local ADF congregations are known as "groves" (like groves of trees), and while group rituals are often regarded as more powerful than rituals performed individually, In 2017 there were about 70 groves worldwide. ADF also has many solitary members; some by choice, and some because there are no groves within easy traveling distance. There are also ADF "protogroves", which are usually one or two people who would like to start a bigger grove. By forming a protogrove, they are able to appear on the list of ADF groves in the organization's online and printed literature, and so attract potential new members.