Gloria Allred is about to RAGE against an Atlantic City casino that allegedly fired 9 seasoned cocktail servers to make room for some younger ladies … and TMZ is covering the news conference LIVE!!

TMZ broke the story … Allred is filing a lawsuit against Resorts Casino on behalf of the nine women … who each claim they got the chop because management wanted the younger women to sport the “sexy flapper uniforms.”

Conference is set to begin any minute.