original, n. — Green’s Dictionary of Slang

original n.

[ext. use of SE]

(US black)

a black person.

1972

Milner & Milner Black Players 304: original a Black man, a soul brother, e.g. an all-originals scene (an all-Black gathering).

all-originals (adj.)

involving black people only, e.g. all-originals scene, a blacks-only party etc.

1972		see sense 1.
1996		Eble Sl. and Sociability 83: A slightly smaller set encompasses music, dancing, having a good time, and performing well. For example [...] an all-originals scene is ‘a party where only blacks are present’.