Whoever played Dominique (however brief the role), she appears to have escaped the movie's credits, and even the ones on IMDb. I'm also not sure who played Miss July; was she one of the "slaygirls"? Any answers here?
shareNadia Sanders, according to the extended cast of characters list above. She was not credited in the movie.
shareHere's the full cast page, which features the extended cast. Scroll down and you'll see that mjw is correct: Dominique is played by Nadia Sanders: https://www.imdb.com/title/tt0060728/fullcredits?ref_=tt_cl_sm
For anyone interested, here's Nadia's IMDb page: https://www.imdb.com/name/nm0761664/?ref_=ttfc_fc_cl_t64