In Mobile we have a Math Circle. This is highly successful, but it is also a long-term, time-consuming commitment.
This paragraph should be formulated as a question. It seems to me that just as there is art therapy and music therapy, there should be Math therapy. My belief (without strong experimental evidence) is that the act of engaging in mathematical activity --- whether it be as mundane as reciting multiplication tables, or solving sodoku, or as advanced as reading the mathematical literature --- exerts a calming influence upon the mind. Thus people with various mental incapacitations could benefit from the therapy of engaging in mathematical activities.
The question then is, "How can the community, or should the community, develop mathematical therapy for adults in various levels of incapacitation?