Somewhere in your state I'm pretty sure there is at least one decent game store that holds Magic (the game) nights. Friends of our family moved to NC and their son is a big Magic player. Point being, a lot of ASD individuals are into games like that and game nights are a social outlet, where at least your son could start to make some limited connections.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).