Or maybe they do the humanitarian stuff to cover the fact they are both evil and way too full of themselves. Abel is a CEO, he would know how the P.R. game works. A couple hundred thousand dollars or man hours invested here and there gives them some public brownie points.
If that don’t work Abel can have Sophia spread her legs for the right people behind the closed doors or a secret science lab.
Highly improbabla! Not only are the humanitarian deeds of those two well known in universe, they are also consistant over time. I am reasonably sure that this trait is one major reason Abel and Sophia detest Chuck in special.
Further we know that Abel and Sophia have access to special black ops labs, they have zero reason to test the drug at the Club. They could test the drugs to their heart´s content and with no risk of exposure there.
While the two doctors are not squeaky clean due to their the end justifies the means stance, they are different from most people in the club. They stand out and their decadent acts are mostly to fit in on the surface.
As for Sophia spreading the legs, you followed them onto the glue, there are enough hints in-game that the gangbang was very unusual, part selftest and part cover up. Hiding the fact that Abel and Sophia do not really fit into the club, but try to fit in until their plans come together.