Besides JWs, are there other Christian denominations where meetings regularly consist of congregation-wide study sessions? I have been in quite a few Jehovah's Witnesses meetings at their Kingdom Hall and am a bit intrigued about the meeting format.

All the Sunday meetings consist of a 30-minute talk (I take this would be referred to as a "sermon" in other denominations), given by an elder. This is followed by the Watchtower study which is like a question and answer session for the congregation on an article from the magazine.

Each magazine has about 4 study articles and so is used for during 4 weekend meetings. After that they go to the next magazine. The study articles in each magazine are on different biblical subjects, like faith/salvation/endurance, and so on.

For example last Sunday's Watchtower study was on the subject "Parents—Help Your Children Become “Wise for Salvation”", from this Watchtower magazine.

Below is an example of the questions that were discussed (from this page in the magazine). The easiest way to explain this format is by a video posted from another congregations meeting; this video of that meeting starts at the point where below paragraphs are discussed.


  7, 8. (a) How does one Christian father show patience in teaching his
  daughter? (b) How have you found the need for similar patience?
  
  7 Thomas, the father of an 11-year-old girl, relates: “My daughter
  might ask, ‛Could Jehovah have used evolution to develop life on
  earth?’ or, ‛Why don’t we get involved in the community​—with
  elections, for example—​to try to improve things?’ Sometimes I have to
  bite my tongue so as not to give a dogmatic answer. After all,
  conviction isn’t the result of one large chunk of truth. It comes from
  many small pieces of evidence.”
  
  8 As Thomas knows, teaching takes patience. Actually, patience is
  important for all Christians. (Col. 3:12) Thomas realizes that there
  may be a need for many discussions over a period of time. He needs to
  reason on the Scriptures so that his daughter develops conviction
  about what she learns. “Especially on important points,” says Thomas,
  “my wife and I want to know if our daughter really believes what she
  is learning and if it makes sense to her. If she has questions, that’s
  good. Frankly, I would worry if she accepted something without asking
  questions.”


Question:

Are there other denominations that have this kind of a question/answer study format as standard part of their Sunday meeting, or is this more like typical to Jehovah's Witnesses?
The English Puritans of the 16th Century held "prophesyings":


  To improve the faith and training of parish clergy, Puritan ministers in the 1570s began holding a series of public conferences at which several sermons would be preached on the same Biblical text, the text would be discussed by the ministers present, and the proceedings would be summarized for the attending public by a moderator. Thus, though ostensibly for the education of clergy, the prophesyings also exposed the laity to Puritan teachings and to criticisms of the bishops and the Anglican Church.... Prophesyings were the first step in the formation of an informal and illegal system of presbyterian church government, which aimed to replace bishops with a hierarchy of assemblies comprising ministers and church elders. Because laypeople attended and observed prophesyings, the gathers were important not only for improving preaching among ministers but for spreading Puritan ideas among the people and thereby creating new adherents to the Puritan movement.


Source: John Wagner (2000). Historical Dictionary of the Elizabethan World: Britain, Ireland, Europe and America. p. 248.