Lifelong Pentecostal here. I’ve attended independent Pentecostal churches as well as Pentecostal Holiness Churches. I even seriously considered going to seminary and being ordained at one point, but ultimately decided that I wanted to become a history teacher.
Well, because of their nontrinitarian beliefs they can tend to get ecumenically isolated, so differences can become magnified.
Never been to a Catholic Charismatic service, so can’t say. You should expect the following layout:
There will be a call to worship/opening prayer. There will be a time of congregational singing, colloquially referred to as “praise and worship” (we know the entire service is about worship

). It will last about 30 minutes to an hour (depends). The music will almost certainly be contemporary with songs written by Hillsong, Chris Tomlin, etc. There also may be more traditional Protestant hymns sung but usually in a more contemporary musical style. There is going to be a band with guitar, drums, and keyboard. The brass section is optional. There may be a choir. Hymbooks will probably not be used (unless you’re going to a very traditional Pentecostal church), but words will be projected.
Praise and worship will include raising of hands in the orans posture (or something that’s supposed to be the orans posture

), may include loud or quite speaking in tongues or shouting or weeping or praying. (This really depends. Some may be as quite and dignified as a Methodist church).
Some churches
may feature “running the aisles” or “dancing in the Spirit”, which is just what it sounds like–running around the church or dancing in the church. The dancing is not suppose to be carnal dancing but done under the influence of the Holy Spirit. This is considered an act of worship and is supposed to be spontaneous as the Spirit moves.
The church may have an area at the front called the “altar” that people can come and pray during the praise and worship time. If someone goes up there, it is usually to receive Christ or receive Spirit baptism or to repent of a sin or to just ask the Lord for something or healing. People will go up and pray with that person and perhaps give spiritual advice when prompted by the Holy Spirit.
At some point in the service, there may be a message in tongues or a prophecy given. This is considered a spontaneous message from God laid on the heart of someone in the congregation. Usually, these deal with run of the mill consolations and encouragements and warnings about spiritual laxity. If its a message in tongues, someone will need to interpret that message.
The service will then transition from praise and worship to the sermon with a few minutes of greeting time (you go around and hug people close to you) and a collection will be taken. You may get a sermonette on tithing from the preacher at this time.
There may be some special singing from someone in the congregation.
The sermon will (or should be) based on a particular biblical passage. There is no lectionary or set readings.Likely, this sermon will be part of a broader series based on a biblical book or concept. Just as likely, the pastor will say that Lord laid a particular message on his heart.
**
Pentecostal preachers
can** be very lively and enthusiastic when they preach, but this new generation aren’t really that different from your run of the mill Baptist preachers in terms of how they “deliver” their sermons.
There may be an invitation to accept Christ at the end of the sermon or there may be a general call to receive prayer from anyone who needs it. If someone is sick or has a loved one who is sick, they may be anointed with oil and prayed for. If someone is in the hospital, a cloth will be anointed and sent to them.
When receiving prayer by the laying on of hands, some people may faint or fall to the floor. This is called being slain in the Spirit or falling under the power. We believe it is simply being overwhelmed by the presence of God.
There usually isn’t any food after the service, unless its a special occasion.