Are you a certified Personal Trainer? I am wondering because it seems that you enjoy exercising and using that as a method to connect with people to help them live a better life. If that is you, the YMCA can be a great place that has great programs to connect with the person. I don't know about the Boston area, but there are YMCA's in the mid-West that have programs for military families to be active and exercise together as a brotherhood. There's LiveStrong which is an exercise program for cancer survivors. There are teen programs to teach them how to exercise properly.
Just putting it out there in case you are looking to go to a place where you can impact people's lives and share your knowledge.