Not even the almost all-star cast, and some fancy camera work by cinematographer Raul Dominguez, (especially in the night club footage) can save this confusing tale of exploited harbor workers, and "ficheras" (dancing prostitutes). By the late 1970s and early 1980s, and beyond, Mexican cinema had deteriorated into the so called "ficheras films" which were nothing but sexploitation at its worse, mixed with loud tropical music, and lousy melodrama. "Noche de carnaval" is just that, and maybe a bit more. As customary by writer Xavier Robles, he added some political rhetoric about corruption in Mexico's labor unions. On these particular sequences, consider it your cue to get snacks from the kitchen or do whatever in the bathroom. When you return, it might be on time to see Ninon Sevilla dancing up a storm in spite of her, let´s say, mature years