There were many aspects of your post that I found quite foreign (don't misunderstand -- that's not intended as a criticism, just an observation). When you say "altar call" is that similar to what Billy Graham does in his crusades? I once asked a Pentecostal minister in Indonesia what the biblical justification was for that practice and he told me he never heard of any other way of inviting men to Christ. So, I've seen it, but it is not something we do.
You ask about my denom -- I'm a presbyterian (part of the "split P's" of this country), but that doesn't tell you much these days. Here is a brief rundown on who we are at Reformation Presbyterian Church Website.