Hamptons tipplers will be hard pressed to find a favorite bottle of rosé out east for Labor Day. We’re hearing that wine shops and restaurants are down to their last bottles of Whispering Angel, Wölffer Estate and Domaines Ott rosé for the summer and rationing whatever they have left. Friday night, Zabi’s in Southampton had three bottles of Wölffer rosé and six Domaines Ott left, after selling 100 cases of each this season. Banzai Burger in Montauk was down to its last three-liter bottle of Whispering Angel after selling 50 cases. Lamplighter Wines & Liquors Co. won’t even sell cases of Whispering Angel — it’s allowing only four bottles per person. What will we drink?