Hobby that I also have leadership position in? (Common App activities section)

I have a hobby (Rubik’s Cube solving) that I’ve done since elementary school. I can consistently solve the Rubik’s cube in under 15 seconds. I’m also the president of the Rubik’s Cube Club at school. I’ve found that I can’t fit my leadership qualities with my personal accomplishments in this particular activity in 150 characters. Any advice?

That’s less than 150 characters.
Believe me, the admission’s committees will get the gist of the role.

All they need to know is that you are the president of the Rubik’s cube club and a brief description of the club.

Club Name: Rubik’s Cube Club
Role: President
Description: Explore the world of Rubik’s cubes through testing new techniques and teaching my club members.