When did the practice of bringing non-believers to church originate? A practice used for Church growth is bringing non-believer friends to church so that they'll like what they see and join the church.

Now, the questions are:


Did this ever happen in the New Testament?
If not, when did this practice start?


When I look at NT, I get the impression that:


The church is a gathering of believers
Believers are asked to go OUT into the world to preach
This practice is mentioned in the New Testament, specifically in 1 Corinthians 14:


  23So if the whole church comes together and everyone speaks in tongues, and inquirers or unbelievers come in, will they not say that you are out of your mind? 24But if an unbeliever or an inquirer comes in while everyone is prophesying, they are convicted of sin and are brought under judgment by all, 25as the secrets of their hearts are laid bare. So they will fall down and worship God, exclaiming, “God is really among you!”


This is clearly talking about how believers ought to behave in a worship setting, for the sake of unbelievers, so it is assumed that unbelievers will, at least at times, be present at the believers' worship gatherings.