I think it takes place every Saturday morning to afternoon, vintage shopping while having a great view at the Manhattan skyline from the East River State park. You will find lots of vintage shops and warehouses around this area of Williamsburg.
Perfect cocktails, chicken fat rice, and a REAL fireplace. One of the coziest spots in Greenpoint, particularly in the winter. Its "off the beaten path" location keeps out the bridge and tunnel goons, so you're likely to meet actual locals. Good for dates, solo thinking, or a small group.