If you ever visit one of our gatherings, here's what you will observe. We meet for a communal meal in someone's home every Sunday evening around 5:30. We celebrate the Lord's Supper every Sunday at our communal meal. Sometimes we will sing some hymns or spiritual songs with guitar accompaniment. There are no youth specific ministries; the kids, from infants to teen-agers, are integrated into the meeting. In the first three years of our history we went through Dallas Willard's Renovation of the Heart video series, studied the DISC profile, read and discussed chapters out of Richard Lovelace's Dynamics of Spiritual Life, and studied the Book of Acts. In the past year we have examined the New Testament texts that pertain to elders and deacons. We are currently studying the virtues depicted in 2 Peter 1:5-7.
Several of the men in the group have provided leadership and some general "structure" for the others. We don't have "a pastor." There aren't any expository sermons. Usually a person prepares some thoughts based on a text of Scripture. After this person shares the group then spends some time discussing what this text is saying to us today. In addition to the time we spend together on Sunday evenings, we do a lot of "life-together" things during the week in groups of twos and threes.
He also writes this about the group of about 20 adults as well as children:
If I had to describe my church I would say something along the following lines. "We are a Christ-centered, biblically-informed, reflective, conversational, alternative Christian community that seeks to be Spirit-led, Spirit-transformed, and committed to life-togetherness in our day-to-day witness for Jesus."
I'm sure it's risky to generalize about house churches, but this does seem to be a nice vignette that has the feel of what I've been encountering among others who are following Jesus in this way.