We would regard five or six couples as the optimum number, but seldom have we enjoyed this luxury. Usually we have had to accept our upper limit of nine couples, in addition to ourselves, making a total group of twenty. Often more couples apply than we can take, and the organizers plead with us to accept the maximum number because family crises can compel couples to drop out at the last moment. Two couples short at a retreat planned for five couples would leave only three. Therefore our normal procedure has been to ask for six to eight couples. Although the selection of the couples has been left to the organizers we insist that husband and wife both undertake to come together, which means that if one has to drop out, both do so; we insist that they come only on condition that they both continuously participate in the entire retreat, from beginning to end. No requirements regarding age, race, vocation, education, or socio-economic status are made. There are advantages in having a homogeneous group of couples, but there are also advantages in a heterogenous group. Our groups have included one engaged couple and one honeymooning couple who came straight from their wedding as well as couples old enough to be retired. They have included highly qualified professionals and blue-collar workers, PhD.s. and high school drop-outs. Couples coming to our retreats should have what they consider to be reasonably good and stable marriages since our purpose is not to provide group therapy, but to foster marital growth. The reason for this requirement is that we do not believe that group marital therapy can be attempted on a short-term basis, and it is not the purpose in these retreats. Many couples come to these retreats with a good deal of apprehension, and some have told us that they would not have come at all had they not been assured that it was definitely not for "problem couples." Despite all our efforts, couples with severe marital problems do get in occasionally under the wire and we found no way of avoiding this. We are often asked to provide preparatory material for the participants, including books to read, but we do not think there is any way to "prepare" for this kind of experience; and recommending books to read might convey the impression that we are going to engage in intellectual discussion, which is not the case. We ourselves do not "prepare" for the retreats and do not ask the couples to do so either. It is an adventure in sharing into which we all move together, ready to take it as it comes.[E] This does not mean, however, that our sessions are totally "unstructured." A timetable is worked out by the group, not imposed upon it. Obviously it has to be planned in relation to the place and the circumstances of our meeting. INTRODUCTION TO THE FRIENDS' EXPERIENCE In the living room of "Waysmeet," the house at Pendle Hill in which we held our first training retreat, there was just room for ten couples to sit in a wide circle.