service sororities and underground "clubs"

Let me just put this out there because I keep seeing these posts.
There are service sorority and underground "clubs"

Underground Clubs that ARENT apart of Panhellenic:
ESA (Epsilon Sigma Alpha) - started by the girls of chi omega after they got in trouble
Trilogy- started by girls of delta delta delta after they got in trouble

Service Sororities APART OF PANHEL:
Omega Phi Alpha - A national service sorority that is apart of Panhellenic but doesn't participate in formal rush because they are selective since its for service!