It represents a, direct, urban approach to asking someone to dance or connect in a club setting, juxtaposed with themes of wealth ("Gucci, Fendi and Prada") and club conflict.
It is often used in the context of bragging rights and, as in the song, trying to grab attention in a crowded, high-energy environment. Dance Wit Chu
The phrase "Niggas just wanna dance wit'chu" appears in the chorus/verse of this 50 Cent track. It represents a, direct, urban approach to asking