There are people who will never move to New York because of, for instance, the scarcity of Dr Pepper, a beverage that inspires fanatical loyalty in some people. The plant in Dublin, Texas, is the oldest continuously working bottler of Dr Pepper and true connoisseurs know that Dr Pepper from Dublin is the best there is. (The same plant bottles Frostie root beer.) Dr Pepper from Dublin is peerless among soft drinks because it's still made with real pure cane sugar instead of corn syrup, which devotees say makes a big difference, though my palate seems to have Pepper immunity. In the past, indefatigable Dr Pepper lovers drove to Dublin to buy it by the case; now, for the first time in years, you can buy Dublin Dr Pepper by the bottle in Dallas. City Harvest, a brand-new gourmet store on Bishop Street in Oak Cliff, sells Dr Pepper (and Frostie) for a buck a bottle, plus deposit.