My friend Ella (Jewelry by Ella) and I recently ventured into selling jewelry at local night clubs on gothic nights (which apparently feature vendors). Our first experience was at Town. What we learned from it is that small items (like earrings) sell best because people have limited cash. Also, it helps to have another person so then one can man the table and the other can get drinks
The other vendors were all really awesome and the clientele (though dressed in black) were all friendly.

They also had cool Halloween decor (see photo).