A cocktail of rain, wind and even a little snow assaulted the farmers market last week. The fair-weather hipsters stayed home. So did the lemonade stand. Altogether, more farmers showed up than customers, and coffee was the only thing that sold out because everyone’s hands were cold. There was a steaming cauldron of chicken congee for sale at the Vietnamese sandwich stall, and had the cardboard bowls not run out, the congee would probably have sold out, too.