We attend a BIG church. As of in "mega" and "you know, one of those churches." I'll spare you the story about how I never thought a big church could be a good thing (then God called me to one and showed me how He uses churches both small and BIG). But this past Sunday, to launch a campaign to reach out neighbors for Jesus called "Bigger than You", our church met together for one service in one building, as opposed to several services on 3 campuses. We also had lots of visitors from other churches, etc. Here's one video that captures the essence of the service, which was the last 5 minutes of it.
and my favorite part, just before the first video: