Worship services are not rock concerts, nor are they the entertaining bit before the message. Sadly, without realizing, people can tune out or miss the first few of minutes of a service because they don't feel they will miss much.
The challenge is to train your congregation to understand and value worship. Worship services are not a 4 song set then on to the next thing, it's an opportunity for God to fill us as we exalt him in our lives. This is a challenge worth pursuing. I've been in many meetings where God began to move so much that we just ended up staying in worship for the whole service. People can sometimes feel uncomfortable or get tired and want the service to move on, but the bible says "wait on the Lord and He will renew your strength" ~ Isaiah 40:31. I'm not suggesting that we get rid of messages in our services; scripture and teaching bring revelation that people need in order to live fuller lives. I am suggesting that we train and challenge our congregations to go deeper in their intimacy with God through worship. Quality over quantity.
Worship opens people's hearts to receive more out of your services. It softens us and opens our eyes and ears to heaven's perspective. Worship cultivates good soil in us, so that God can plant seeds of revelation that will flourish. Worship moves God back into his rightful position in the center of our lives. God created us to worship Him and this is what our future in heaven will consist of! Teach your churches to value worship on a deeper level and watch their lives transform because of His presence!