Clubs live or die based on participation/volunteers. I belong to NIFE, but I'm not a very active member. I don't attend meetings, don't vote, and only attend 1 event every few years. When I do attend an event, I try to volunteer, but this is of limited use, as most of the work has already been done by the time the event happens. Just physically being at an event is good, but being a part of the event is so much more helpful to making events happen. I'll admit to being a mooch, a freeloader, someone who does little or nothing to gain from the hard work of others. As my kids get older, I hope to have more time to volunteer.
This is not a 1-way thing, either. As with any other group, volunteering is a great way to get to know people, and form personal relationships. The more you participate/volunteer, the more you get out of an event/activity.
When a request comes out for help, in whatever form, read it as "opportunity knocks". The request could be for making phone calls, taking pictures, being some form of leader, making signs, etc. Usually, the need is for you to contribute your time. I strongly encourage each person to not only respond to requests for help, but also to seek out these opportunities. Your time and enthusiasm help keep the group alive.
Also, each member is an ambassador for the club. Our representation of the club will potentially attract or repulse potential new members.