I had an extremely atypical high-school experience. I attended an all boys, Catholic, JROTC academy. The JROTC part used to be mandatory, but it wasn't by the time I got there. Either way, 95% went JROTC. Regardless....
My high school didn't have much in terms of clubs. There was the super nerd stuff like physics, math, and chess club, so I decided it was much better use of my time to go home and play games instead of hanging around for an hour after school. I already showed up there at 7am every day for drill team practice :\
Oh, I was in NHS, but we didn't do shit as a club. And, since my school bordered on the homo-erotic, I was part of a club where we dressed in BDU's and went into the wilderness owned by the school and played war games. And by war games I mean wrestling. I didn't see fit to bother going after about 5 months.