So different groups have different definitions, and then they clash on those. So it takes adept leadership to say we're going to work through these.

I think it's pretty dynamic. There's a lot of energy there and life, and you'll have women dressed in their traditional African dress when they come, and you have people from all over the place, and some people have headphones on because they're listening in Spanish.

So the tradition from Europe is that you're supposed to emphasize the mind over the body, so you sing from a very kind of staid perspective. Again, there are charismatic white congregations all over, and they don't sing that way. But, you know, on the average.

It's one of the things we find in these congregations is that they are much more likely to be sort of up-beat worship styles, more likely that people in these congregations say "Amen," maybe get up and dance some, tend to be a little bit more lively than a typical white service would be, but not as lively as a typical black service would be.

So it may be a language that separates you - again, social networks. But second-generation Asian and Hispanics, second, and third and fourth and so on, they are much more likely to be in integrated churches than are blacks or whites.

Call-and-response style, yes, exactly. So whenever different groups get together then there has to be this long period of negotiation. How will we worship? What's acceptable? What's not? If I want to say "Amen" can I?

I never meet a church that wishes they didn't do it. I never meet a leader that wishes they didn't do it. They will all say, to the person, it's hard. It's difficult. It comes with complexities and confusion as you're trying to go across cultures, and you don't understand, you didn't mean to offend somebody but you've offended somebody. But they will all say it just does something.