There are thousands of brands of Christianity (called denominations). However, if you look closer at all the denominational and non-denominational churches in the world, there are really only two ways of having church: 1) Spectative church & 2) Interactive church.
Spectative church is widespread. It is a passive form of church where people sit and watch a professional do religious things, unless they are told by the professional (or a bulletin) to stand or sit or say something. It is highly programmed and human led (usually by one man & a helper or two).
The other type of church, interactive church, is very rare (especially in the Western world, however, it is common in China and other places where the church is underground). In this form of church people are given the freedom to directly interact with one another and with God as they are led by the Holy Spirit. It is based on the only Scripture in the New Testament that tells us how to hold a church meeting: I Corinthians 14:26.
To experience interactive church is an amazing thing. See for yourself by visiting The Salvation Army Berry Street, an interactive church in Nashville, TN — 225 Berry St., 37207, on Sundays at 10:45 am. & Thursdays at 6:30 pm.