Community service and chapter recruitment can come in some pretty unique ways. Denmark FFA hosted a brownie troop working on their animal care badge.
That looks like more trouble than it's worth...right? Or is it?
First anything worth doing is going to be an imposition. If it's so easy that it's a no brainer either there's not much effort being put into it or it's so common that it really isn't that interesting. Unless, you have a great group of students who do most of the work for your chapter then it really is easy...for you.
What it comes down to is that there are so many benefits for your students to host a local troop or 4-H group or even a home school organization. The students get to prepare what they've learned, use their public speaking skills, you get some great photos that at the very least you share with your principal at the most make it to the local paper, and you now have a young group of kids who know about your classes and have something to look forward to.