Todd's summary history is spot on.
My wife and I attended New Life OPC in Jenkintown, PA when I was attending Westminster in the late 70's.
The church met in a YMCA gym and we helped put out chairs for the service. I remember that many, if not most, of the congregation felt quite free to raise their hands in worship, yet I doubt there was a charismatic among them. The singing was hearty, and Jack Miller's sermons could easily go on for an hour. He was at times a very emotional preacher.
But that was years ago and I can't speak to where those churches are now in their worship style or content. Nonetheless, I'd have to confess the term "loose" needs to be defined. Without context and by itself, "loose" is too loose a word.