Chuck Palahniuk's novel "Fight Club" is not about a place but a state of mind. It explores a masculine expression of rebellion in response to feelings of alienation and disillusionment derived from the constraints of social expectations. The club participants enact violence and pantomime anarchy to express a deep desire to disrupt the social order, which they experience as inherently empty and dissatisfying.
In the same way, "(T)he night club" is a feminine expression of a desire to embrace brief faux intimacy in a room full of men in a world full of men that have proven incapable of sustained authentic intimacy.
The artist has depicted the men in the club as similarly indistinct in their bland sexualization, and alike in their determination to look away from the girl as "they dance with her." On the other hand, the woman is stepping out of the scene, perhaps suggesting she recognizes its artifice or contrary, understands its ability to affect onlookers by connecting to something hidden from routine daily life.