There is an assumption that those who prefer more simple / organic church to more organized / institutional church also disdain or reject any kind of structure or organization. This is a false assumption. In fact, any time people gather together there will be some kind of structure and organization.
For example, if two people meet together for lunch, there will be some type of organization involved: where are they going to eat, what time, who is going to pay? Answering these questions define an organization for their time of eating lunch together. But, what happens if the same two people get together for lunch the next day? What if they get together for dinner? What if there are now three people getting together? Does the same organization still apply?
So, there will always be some type of organization. The question is: Is the organization flexible and fluid enough to follow the form of the people involved? As the people change (either by new people coming together or people maturing or changing life situations) the organization changes as well. As the opportunities for service change, the organization changes as well.
The other side of that spectrum features an organization that is fixed, and the people must fit themselves within that system or face being rejected (either intentionally or unintentionally).
In her post (linked to above), Katie offers several suggestions and a much fuller explanation than I have provided here.
How can we ensure that the people, giftings, service opportunities, etc. are defining the organization instead of the organization attempting to define the people?