The overwhelming success of a little restaurant, The Meatball Shop, specializing in uncomplicated but flavorful meatball dishes, in the heart of the Lower East Side has been followed by exactly what one would expect: a second location. This time, they’ve tackled Williamsburg, and despite having only opened two months ago, the Shop fits the hippest of Brooklyn neighborhoods like a glove.On a Thursday evening, the place is packed- the results of which are obvious, with a 20 minute wait for a table and patrons spilling onto the street out front. No one seems to mind, though. The crowd is mostly twentysomethings, content to order drinks or smoke outside. The full-service bar’s latest addition- a cocktail menu- is fun, with the option of concocting your own drink (virgin or otherwise) and a “Big Kidz Menu”, which gives you choices ranging from jelly shots and “Fool Aid” to whiskey floats.