My club has a "Junior Board" which consists of all of the kids and 2 advisors from the Board of Directors. They do a lot of different things, community service, rink service, social and fun events, competition send offs (usually a sign hung in the rink), they do fund raising for the "scholarships" they give to the seniors at the end of the year banquet, etc. I think the best things they do are the fun and social things as well as the community service because it does get the kids together so that they meet the other kids in the club. I know for our newest members of the club (coming out of skate school), it is a huge help for them to start to get comfortable and to make some new skating friends.
In the past they have done a snowman building contest, planted flowers outside the rink, done a car wash, Thanksgiving dinner, they have been selling snacks and coffee/cider during skate school, and other things.