What's the Point of Worship?

Church always starts with the band leading us in some worship. But why is that? Why do we start our Sunday church with worship times? Could we have church without the band? What's the point of it all? It's often easy to slip into the routine of just "going through the motions" during the worship time and just using it as a warm up for the real stuff. Or analysing it as a performance. Here we have a chat about whether we could do church without the band and what the purpose of the worship time actually is.