Many wineries are leaving their vineyard homes behind and moving to New York City. City Winery, a night club crossed with a winery, will open what it bills as Manhattan’s first private label winery at 143 Varick Street this fall. Michael Dorf, who owns the Knitting Factory, is heading up the venture. David Lecomte, a French winemaker, will supervise the wine-making operations. Crushpad, a San Francisco-based winery, will also open a city winery in the fall. Brooklyn already has its own wineries, including Brooklyn Oenology and Bridge Urban Winery. Another is planned for Red Hook, at a warehouse by the Fairway supermarket.