@Sciencnerd USAFA admits students based on a whole person concept. Varsity sports participation in High School is not needed but you need to still be strong in fitness and leadership. Leadership activities and athletic endeavors can come in many forms. It sounds like you have both bases covered with your current scouting and TKD pursuits. Your CFA should demonstrate your athletic aptitude and your student resume should document your leadership potential. My suggestion is to ensure you are leading the organizations you choose to participate in and have meaningful leadership challenges and accomplishments you can speak to in your written responses as well as interview responses.
As for clubs at USAFA, you can read about some here:
https://www.usafa.edu/cadet-life/clubs/
In the world of Cadet Clubs, they do tend to morph each year due to popularity and as some group leaders graduate, the group can fade. You can start a club but will need to find an officer willing to sponsor the group - the Officer In Charge or OIC. In terms or martial arts clubs, it ranges but I have seen competitive sport karate, judo, aikido, and ninjitsu. There are likely others that have popped up like mma as trends have changed over time. You will learn more about what is available to you during Club Day which happens right after Basic Cadet Training.
During my time at the Academy, the USAFA Karate Team was a collective of many styles including TKD. In fact, one member was also on team USA TKD and competed in the Sydney Olympics. He has gone on to compete internationally in the military throughout his career. The team was funded to travel the country and fight in sport karate tournaments. The USAFA karate team did extremely well. They practiced 6 days per week and had limited onseason status (LOS) which meant members did karate instead of intramurals - just as if it were an intercollegiate team. If most enthusiasts practice one day a week for two hours, think about the competitive difference of practicing 6 days a week and then fighting those guys? The team would practice more in a month than most of their competition would practice in a year and it was obvious. Like most sports, the national travel teams (and there are several in Karate) have a clear funding and skill advantage over local-yocals who show up to a tournament in their town.
At the time, USAFA had a unique advantage of the OIC being a Kempo instructor and an affiliation with a local school for curriculum and advancement. Most importantly, the team has/had access to USAF Reserve aviation fleet and could call base operations and request a sortie for the group to fly to a tournament. Every weekend there are reservists flying in empty planes for training requirements and club teams give them a mission to take passengers from Peterson Air Force Base to anywhere they need to go. (Good times!!)
USAFA recognizes club participants at the end of the year with superlative awards like Best Male Athlete - Club Sports or Best Female Athlete - Club Sports
