During one of the confrontations in the bar, Brunt says that Nilva will be arriving "tonight" and no one contradicts him. But later, when Nog says that Nilva has arrived, Quark protests that he's not supposed to arrive until "tomorrow".
When Nilva and Quark (as a female) are talking at Quark's bar, you can see Henry Gibson's real teeth behind the Ferengi fake ones.
Ferengi culture seems to have developed a well-defined sense of female fashion, highly distinct from the way males dress, which is odd in a culture where women have never been able to wear clothes.