It occurred to me today in adult Sunday School that all churches are seeker-friendly in some sense. Any church that has members had folks who sought them out, even if only for reasons of habit or family, and felt welcome enough to stay.
The difference is whether you are appealing to a broad range of seekers or a narrow one. What we call seeker-friendly churches are those which appeal to as large a number of who they think is out there as possible. The complaint against them would be that they appeal to a lowest-common-denominator. The complaint against the other churches would be that they have narrowed their appeal so enormously as to become useless. If you only appeal to cradle Baptists over 60, that's too narrow. On the other hand, appealing to the most generic group of seekers will leave out folks who aren't very generic.
Our church is populated by well-educated 40-60 year-old evangelicals and their children up until they get driver's licenses, at which point they go elsewhere, or nowhere. Just about every family has at least one person working in education. That's too narrow. People who fit that demographic feel really comfortable from the first week they come - all well and good - but we should be able to expand that somewhat, wouldn't you think?