I would have been in the "nerd" group in HS, but I basically dropped out of the HS social scene entirely.
That was my group during school hours, but after school I spent huge amounts of time at my martial arts school. For good portions of my time during HS I was there 4-6 days a week, between my own classes, teaching classes, etc. Particularly my sophomore year as I was preparing for my black belt test, and my senior year as I was preparing for my 2nd degree test. That was my social circle far more than almost anyone in my HS except for a tiny handful of close friends.