There are too many individual activities to enumerate, but all of the extra-curricular, bad-association oriented activity that taught life skills, people skills and survival skills are symbolized by Sparlock. Scouting, ballroom dancing, exchanging Valentines, sports, chess, clubs and school politics are just a few.
Academic achievement is another. JWism undermines that, to be sure.
Choosing a life partner from the large pool, not the tiny, restricted entrance pool. Getting to know that person before committing.
Enjoying life's pleasures without guilt.
Just a few of the Sparlocks missed.