Exactly what is a fichera? Short explanation: it’s woman, in these days generally an older woman, that you pay to dance and talk with you. You pay them with fichas (chips), hence the name ficheras. And that’s it. Well... sort of.
In the 70’s there was whole movie genre based on ficheras with an erotic subtext. Many ficheras were also sex workers. But not always. Nowadays there are a few ficheras places left in Mexico City. Salón San Luis, located in the Roma neighborhood, is one of them. No interior pictures allowed though.