By 3 p.m. on Saturday, when Dutch Kills’s cocktail window opened for business, there were already a half-dozen people lined up outside. The famous Queens “speakeasy” has given up the last pretense of being secret, with a bartender in a mask taking orders — martinis, Manhattans, mai tais — next to a sandwich board that asks patrons to “keep it safe and keep it moving!” There were snacks for sale, too. And for an extra $2, I could get a