oligarchy
I don't know if there is a word that refers to a small group of people at a church, but I do know that a group of people at a church if you are referring to everyone in the church as a whole would be called a congregation.
A government controlled by a small privileged and powerful group is called an oligarchy.When that group consists of aristocrats, it is called an aristocracy.
For information there is no one called "everyone" in this world.
Elites means the more powerful group of people.
A group with nine people is called a nonet.
A group of people is called a crowd
a group or team of intelligent people are called wath
The Most Powerful Group Among The Aztecs Were The Mexicas .
It's called a group.
A group of people is often called a "crowd" or a "gathering."
The group of people in the church are called a congregation.
The quadriceps muscles of the thigh consists of four distinct muscles. This muscle group is the most powerful one in the lower extremity of the human body.