Buy a bottle of Vodka in Greenpoint and take your party home: Greenpoint has started to become a trendy scene. However if you just go into any alcohol store next to some place that sells great salami then they're liable to sell you great vodka. For cheap!! I'm talking great bottles for $15.
If the store next door is selling salami, you're in the wrong part of "Greenpoint". But to the larger point, yes, plenty of good Polish vodkas in Greepoint. Luksusowa makes a great potato vodka.