If I may be so bold, I would argue that most of the time when we say church, we are referring to a building or a meeting or something like that. Sometimes, I talk about church this way. I'm not sure I've ever met a person that didn't refer to the church this way at some point. In my estimation, there are negative and positive aspects of this idea.
First, the negative: I don't think the scriptures talk about a church being a building or a meeting. The word that is written in Greek (ekklesia) means a group of people called out or separated. In fact, here's a useful link to help you see what the word means. Basically, if you went up to Paul (the writer of a lot of the New Testament) and told him you were going to 'go to church,' he would have no idea what you are talking about. It would be like us saying I'm going to go to baseball team.
The positive: if someone did happen to tell you they were 'going to baseball team,' you would probably understand that they were going to practice baseball with their club or go do something with their club or even go do something to benefit their club. Likewise, when people say they are 'going to church,' they probably mean they are going to meet with the church or do something with their church or do something to benefit the church. It's just a term we use.
The verdict: I don't think people are going to stop referring to church gatherings or buildings where they meet as a church. On the other hand, it is important to be important with our words. So, be careful about what you say and about what you mean. Don't be overbearing. Speak truth in love. Serve Jesus and His church.
