Here's another "any movie with a scene like this" search. A fight between a white woman and a black man, from a movie made in the 1970s or 1980s. I just know that a Cynthia Rothrock (http://us.vdc.imdb.com/name/nm0001686/) movie has to fit this, but I do not know which one.
A female warrior film, like "Red Sonja" would also seem a good candidate, but I haven't spotted any fights like this after skimming several.
The only movie that springs to mind is Gloria (http://www.imdb.com/title/tt0080798/).
Can't recall if she fought a black man in it though.
Unfortunately, the only title I could positively find such a fight in was "Death Dimension" and it is pretty short. I am dead certain a Cynthia Rothrock movie (one of them) will have a scene like this, but I don't have many in my collection.
"Election 2008"
?
sorry.
Maybe
"Whore" with Teresa Russell?