We should be praising, learning and walking with Jesus every day. Church on Sunday is a time for worship and hearing the Word, of course. But it must also be about fellowship.
If you walk into a congregation and no one talks to you, or engages with you, I think that is a dead church. Ekklesia in Greek means "called out ones." We are called to be one with other members of the body of Christ, (see John 17) and if no one connects, how can you be one? Any unsaved person who walks into a church and no one reaches out is going to be less likely to return, because there is no love for one another. (Of course, the Holy Spirit can overcome this!)
When we moved to a new province last year, there was a large church in the same denomination we had been in. I thought we should try it, but I wasn't expecting it to be friendly. The song service was literally a rock concert! I'm surprised they didn't sell tickets. The preaching was fluff, but the worst part was not one person said hello or even smiled. 3000 people attending church by themselves!
Our new church, much smaller, was radically different. The music was excellent, but not inaccessible. You could hear the congregation singing and worshipping God. It was not about the worship team, but about God's people being led to come before God and give him praise! The preaching was excellent. Although when the pastor went on sick leave, the church went 4 months with congregation members preaching, and it was amazing. There was real unity in the themes from week to week, although no one talked to each other. It was truly the Holy Spirit leading.
But the best part was the love, caring and sharing. We were greeted by 20 people our first service. Plus, everyone wore name tags, so we quickly learned the names of people. We became involved, including for me, getting into a music team (so many churches are locked out for new musicians!) I was preaching only a few months after we got there, and my husband found his niche helping with the building committee, doing renovations.
I'm also teaching and we are in a small group Bible study. Which leads to my last point. Can you give in your church? Whatever your calling, from taking care of babies in the church, visiting elderly congregation members, to the more visible things like worship teams and preaching. Paul says we are members of the body, and we cannot do without the foot or hand. A live church allows the gifts and callings of God to be exercised.
I've been in lots of churches with lots of yelling, jumping up and down, and then people thinking the church is alive. And it may be! But is love extended to people? Are gifts being exercised, or does a small group demand to do everything? That's my experience and opinion!