Why? You might ask.
As the New Testament church grew it is recorded for us that they not only met in the temple courts but went from 'house to house'. The home is the centre of family life and love, of good conversation, of great food, a place of discipleship and learning, a place of sharing, of giving, of safety of joy and of peace.
I believe there are four advantages of meeting with other Christians in small groups as the church grows:
It is infinitely expandable
It is unlimited geographically.
It is good stewardship.
It promotes relationships
There is great benefit and wisdom in God’s way of multiplying small groups. As a result, the Bible says that the Lord added to their number daily those that were being saved.