I was reading articles about the history of church pews and it seems most writers feel that pews became important at the time of the Reformation. In Roman Catholic worship the focus was on the communion and provisions for congregational seating were not of major importance. With the Reformation, the focus switched to the sermon where the congregation remained seated for a lengthy period of time and where and how they sat became more important.
That may be true, but I was raised in the Anglican tradition which did not fit neatly into either category. There were two Bible readings in every service, one from the Old Testament and one from the New. In addition there were a few significant passages of Scripture that were spoken aloud, either in unison or as responsive readings. There was a sermon, usually not lengthy, and often there was communion, but the real emphasis seemed to be on the Bible.
Contemporary worship music seems to have come front and centre in most evangelical churches today. Thus the worship leader who leads and directs this aspect of the worship service seems to be as important as the preacher.
Early Christian worship took place in places like private homes, forests, or the catacombs of Rome. This type of worship did not require a special church building, nor did it require pews or musical instruments. This was worship stripped to its bare essentials: Bible reading, prayer, and exhortation to faithfulness. And people risked their lives to be at these worship services.
Anabaptists retained that simple style of worship throughout most of their history. One could question whether the many persecutions they suffered made that the only feasible style of worship, or whether they were persecuted because they chose to avoid the worship style of the official churches. Both were probably factors.
Today, we of the Church of God in Christ, Mennonite consider ourselves to be linear descendants of the Anabaptists. Bible reading, prayer, hymns and a sermon all have a place in our worship services. The sermon usually consists of some combination of exposition of a Bible passage, teaching, testimony and exhortation to faithfulness. It is not a prepared, scholarly discourse, but flows from a heart inspired by the Holy Spirit.
We sing both old and new hymns, without musical accompaniment. The message of a song remains with us much longer when we all sing together, rather than just listening. Many have testified of times of difficulty or crisis when part of a song has popped into their mind with words that brought comfort and direction.