I'm not sure what you want me to tell you.
Again, focus on emphasizing what you have, rather than worrying about what you don't have. If you really are concerned about not having enough leadership experience post-college, then GET SOME. And if you are only going to pursue stuff purely for a b-school application (i.e. you wouldn't bother getting involved if it wasn't for the b-school app), then you've got it ass backwards.
Focus on life and career first -- and when the time comes for b-school apps, do the best you can to sell what you have. It's pretty easy to spot someone who is window dressing their life.
You can't game the system. Worrying about what adcoms care or don't care about is really not productive (because in reality, adcoms care about finding high caliber and talented applicants just like anyone else - they like people who aren't worker drones, who have a bit of depth and personality, who are active people, and so forth -- if you want to be that, then focus on developing such things!).