Transfiguration Club Leader- Perhaps a club dedicated to the art and discussion of Transfiguration, or an ongoing icontest with transforming graphics? Contests where one could "transform" a given image into another? Up to you, future leader!
Wizarding Games Club Leader Discussion of Wizarding games- quidditch, wizard's chess... maybe play a few rounds? HP Crosswords? Up to you, future leader!
Application can be found here.
Most clubs are currently listed with available leadership positions. This is not official until nyreak's Thursday deadline for continuing clubs leaders to reply affirming their position. If you've already affirmed here in the ROLL CALL post, and don't see your name by your club, let me know and I'll straighten it right out.