Jesus gave us a commandment about what worship should look like. He took the bread, gave thanks, and gave it to his disciples, saying, "This is my body, given for you. As often as you gather, do this in remembrance of me." Again, after supper, he took the cup of wine, and gave thanks, and gave it to them, saying, "This cup is the new covenant in my blood, shed for you and for all for the forgiveness of sins. As often as you take it, do this in remembrance of me."
Jesus made it clear that every time we gather, we should share the bread and wine of Eucharist. He never said we were required to speak on Scripture for 20 minutes, 30 minutes, 60 minutes, or anything. Of course, a preacher should speak on Scripture, and teach it as often as possible.
For that reason, my church, and many like it (Catholic, Lutheran, Episcopal, and many other denominations) have a set liturgy that follows Jesus command, serving communion every week. The liturgy looks like this:
-Opening prayers (often with a hymn or two in here)
-Reading of Scripture (usually 3-4 passages of Scripture, including Old and New testament readings, and always ending with something from the Gospels, sometimes a hymn or two)
-Sermon or Homily (usually on those Scriptures that were just read)
-Creed, additional prayers, offering of gifts (sometimes including confession, another hymn or two)
-Communion (the sharing of Christ's body and blood -- some churches think this is symbolic, others see it as "transubstantiation" or "consubstantiation" ... whatever theology you believe, all Christians agree it's something really special that Jesus does for us, and a means of grace, and yes, singing)
-Blessing and dismissal (again, hymns as we go ... gotta sing!)
Of course, by "hymn" I'm including modern praise music as well as traditional hymns. A hymn is any song of praise, and could be a choir anthem, a rock band, or the traditional organ with congregation.
The Sermon is only one small part of the service. I have never understood churches where you show up, sing a few songs, then the preacher gets up and talks for 20-30 minutes, then you sing some more, then you leave. Like the only reason you come is to hear the preacher preach. That ain't church, sorry. That's a preacher who likes to hear his own voice. Church isn't about what some man or woman has to say. It's about what GOD has to say, and what GOD did, does, and will continue to do. Yes, I appreciate a good sermon, but that really isn't what's most important.