Isn't it great how people who are not a member of certain organizations can tell the members of those organization not only what they are or are not, but also how they're run.
NOW, the question IS can a member of an NPC/NIC/IFC org be a member of an NPHC group at the same time, ie WHAT ARE THE RULES REGARDING THIS.
The question IS NOT whether NPHC groups are service/social and/or subject to Title IX.
Things would be just fine on this board if some folks would keep their mouths closed if they don't know ALL ASPECTS of a situation.