When you become comfortable in certain situations it is hard to leave and start over. Especially if there are feelings and emotions involved. Adjourning something that has created a bond between a group of people can be hard to walk away from.
When I was in high school I had five very close friends, we called ourselves the "05 Heffas" because of our graduation year. We had to face the fact that we all would be seperating from each other in August of 2005. We have all known each other since we were in elementary and middle school. We all were going to different cities and we were going to build new friendships. Before we graduated we tried to spend as much time as possible with each other. But, our separation wasn't that bad because we would get together for holidays and over the summer.
I think adjourning can also be a time to grow and to see what you have learned from that group. From my group of friends I learned how important friendship is and even though you may be distant from each other, your friendship should be strong enough that you never miss a beat when you meet again.