Ideas For A Teen Health Club At A Public High School?

I am a highschool student bouncing around ideas for a new health club at school. I plan on having monthly hands-on, active volunteer projects (think gardening), and serving healthy foods at club meetings, which will take place weekly.
I’m short on ideas on how to conduct the meetings though. I’ve thought of comparing nutrient and calorie density of healthy foods VS junk food. I will also share other interesting tidbits of nutrition info that I find in health magazines. What other activities might keep the things alive? If anyone has ideas for any fun games (or more general ideas for club meetings) that will motivate teens to eat well, I’d be thrilled to look into them.
Though I might put this in Diet and Fitness or Vegetarian and Vegan, the club’s objective will not be to encourage students to lose weight or go vegetarian.