Maybe you should pay people to attend your church
Do you know what a mystery shopper is? The idea is this. A retailer pays someone to shop. (My wife would love this job!) They shop and then report to management about their experience--how helpful and courteous the staff, how clean the restrooms, and so forth. Of course, at the time they are shopping, no one knows that they are actually an employee of the company. They pose as a regular shopper. It is a mystery who these people are. When Jim Henderson was a pastor he used to do this regularly as a means of improving his church. He wanted to get a feel for what it was like to visit his church, so he hired "mystery worshippers" to visit and then report to him on their findings--how friendly the people are, how clean the rest rooms are, and what is an outsider's perspective on the music and preaching. Maybe you should do the same. Maybe you should hire people to come to your church and give you feedback on how you could improve.