Think of St. Mary's vs Brophy/Xavier.......only nastier.
Sacred Heart/Griffin used to be separate schools - Sacred Heart was all-girls, Griffin was all-boys. A lot of the guys that went to Griffin lived in the Southeast HS area. Southeast (pre-busing) had a large black population, and even after busing started (mid-1970's) was thought of as the "black HS" - even though the other public HS's in the city had the same percentage of black students as Southeast. Anyways, Griffin and Southeast were huge rivals. I can remember Griffin students painting our huge statue of a Spartan black, and SE students retalitating by painting statues on the Griffin campus pink. Another time, at the City HS Basketball tournament, some Griffin Students carried around a white sheet that had a map of Africa painted on it, with the caption "Home of the Spartans"......