Hello and thanks for your post.
I think that the best way to reach so-called at risk and not-so at-risk groups is to implement the now 2 year old recommendations for opt-out HIV testing for all persons in the US. Doing so will decrease the stigmatization of testing, since it is no different that checking one's cholesterol or other preventive medicine screening.
Whether they're church-going, career-minded, gym membership-having, "healthy" living husbands and fathers or traditionally high risk groups (MSM, drug users, etc), HIV testing is simply part of preventive medicine.
In my world (at least for HIV testing), I don't try to categorize persons as high- or low-risk. Rather, I categorize persons as committed (or not) to their health and the health of their loved ones.
BY