I am all for outreach, missionary work, reconciliation, however you want to wrap your mind around what this would be, except --
I think it would be dangerous and self-defeating to present the aims of the CMAA, (not the CMAA itself, mind you, we're just a bunch o' guys with no claim to authority, but the aims,) as just another item on the buffet, and an exotic and not-to-everyone's-taste item at that.
Gregorian chant, music that promotes reverence and recollection, adherence to the music precepts of the Church as expressed in authoritative documents, respect for the integrity of the actual texts of the Mass -- these are not pickled herring.
I think a better way to go would be offering add to the "swag."
A beautiful pamphlet digest of the musical rubrics of the current GIRM, for instance, also providing links to free msucial resources on the Interwebs.