It all depends on why you want to join a church. Many join churches because they want to be leaches, getting what they can out of the ministry. If the ministry doesn't suit them they leave a find another church that can give them more of what they want out of it. What happens is that they find the church that suits them and they rot away in the pews as useless drones, getting "fat" on the input, and contributing nothing.
Jesus said that it is more blessed to give than to receive. Those who are the "movers and shakers" in the church are those whose attitude is to put into a church according to the gifting God has given them. Not all can be the preacher, but there are many other ways people can contribute to a church. Some contribute financially, others are musicians, others are great in the catering department, still others are practical handy persons, like when a member accidently drove her car through the front foyer of our church, and we had a builder in the congregation who came straight away and made the front of the church secure until we could get the framing and glass panels replaced.
A church is more than just the Sunday services and the preacher. A church needs administrators, accountants, maintenance people, and even tea ladies, as well as Sunday school teachers, people to manage the church op shop (which keeps our little church open with the profits that come from it).
There are people who all sorts of gifting and skills sitting in large churches doing nothing except moan and groan when things don't go their way. They are mere useless drones who occupy a pew on Sunday morning, but do nothing else. They are just bums on seats to make up the numbers but otherwise useless to the body of Christ.
I wondered what I could do when I first joined my little church, but after less than a year, I am now on the Management Committee, take a service and preach once a month, and am the backup pianist when our normal pianist cannot play through illness. When I first joined, I told the senior elder that my greatest contribution to the church is "being here" because one more person is a valuable addition to such a small church. It wasn't long before I was doing tasks in order to further contribute to the church. Therefore I would rather be in a small church with six old ladies and one man, and making a meaningful contribution to it, than sitting in a church with 400 people in it rotting away uselessly sitting in a pew.
But you see you still missed it, as so many do. Christ has His church the Spiritual one, made up of those who follow Him, and there is mens Church the Harlot. We become a part of "His" Church, when we come to Him and Receive the Holy Spirit, and so become joined to Him as His bride, when you Join mens church you become joined to the harlot, this bit
1Co_6:16 What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.
Its all about marriage, if you are joined to Him and than Join mens religion the Harlot church you too become a harlot, because you are in the Spirit a woman being now joined to another woman, you know what that is dont you. You cant be His bride, pure spotless and without blemish while you are joined to a harlot.
1Co 6:15 Know ye not that your bodies are the members of Christ? shall I then take the members of Christ, and make them the members of an harlot? God forbid.
Is that what you want, satan loves religion keeps men "doing', instead of walking in faith.
1Co_6:17 But he that is joined unto the Lord is one spirit.
So who is it you want to be joined too.