Our church has "Small Groups" that meet every other Sunday night. The point is to have a smaller group (6 - 8) of people than the Sunday School class where you can get to know each other better and share more intimate details of your lives. Although the church has a "schedule" that can be followed, each small group can decide when/where to meet and what to discuss. Our Sunday School teacher provides us outlined questions based upon his lesson for that day, but it doesn't have to be followed. There is a lot of leeway in terms of what you discuss. Mozz and I have done it for two years now and really enjoy it. We meet at each others homes on Sunday night with a potluck meal and conversation/dessert afterwards. It's really been neat to watch all of us grow, individually and together.
I've actually found an accountability partner out of our small group. We meet every week though.