I was my "Pledge Class President", though looking back, I'm not sure how much leadership that actually entailed. But I think it's a good idea to let them know that you wouldn't be a passive member of the organization, should you become a member. Definitely let them know that you want to be involved, help whenever possible, and try to make it an even better organization throughout your years there. There is a fine line between that and saying something like "I WANT TO BE PRESIDENT OF THE SORORITY NEXT YEAR!" at your first recruitment party, however.
