Perhaps these are the definitions --
High Church: the church has both a boys' choir and a professional soprano as well as a working pipe organ from the early '40s
Broad Church: the church has a very good tenor and a hidden keyboard
Low Church: the church has a three-person praise team and a band that includes at least one guitar, a drum set, bongos, and various other instrumentalists who each show up sometimes.
Well, really, I am not sure how well these terms work today. Are they broadly used? But perhaps the terms are not really what you wish to discuss. Maybe you wish only to discuss dialogue, because in reality, while the articles of faith may look similar, they really are not, and the ways they are practiced differ from church to church. (Within the Baptist churches alone, they vary strongly.) I have learned that how their statements read means nothing, especially when even the words' definitions vary from congregation to congregation and even from congregant to congregant!
Or perhaps you are crying out, as did Rodney King, "I just want to say, can we all get along? Can we get along?"
Actually, if that is your purpose, I think that
most of the time, the people on CFS do get along very well. I find most people to be gentle and considerate, and there are some I could name as experts at this.