So on the idea of introducing not just IFC/NPC orgs to people rushing, they did this at my old school during recruitment. The multicultural orgs would be there for the first night or two and then an individual would reach out if they had interest.
Sadly when someone asked "Oh what orgs are we visiting today?" a rho gamma stated that XYZ fraternity wasn't going to be there that night and I heard a "thank god" from a guy in the back
.
On the other hand if a school has a Meet the Greeks sort of thing they usually will have all of the organizations show up and then the multicultural/NPHC orgs would usually do a stroll/step they had prepared, which would get the room extremely excited, including myself.