Tucked into an office tower in Boston’s Financial District, Common Vines packs a lot into less than 900 square feet. A marble counter, used for daily tastings, dominates the space, backed by a couch and a children’s nook. Floor-to-ceiling racks line the walls, with 450 selections especially strong in smart finds in the $15-to-$25 range, like Gen del Alma’s Ji Ji Ji, a blend of pinot and malbec from Mendoza, at $17. There are also plenty of off-the-beaten-track finds like Kiralyudvar’s dry furmint from Tokaj in Hungary, and Bisson’s Marea from Liguria’s Cinque Terre. The shop is run by Jennifer Scott and Chris Hsi, who live across the street with their three children; they also run Taste Wine Bar & Kitchen around the corner form the store, where you can taste the wines over a plate of charcuterie and cheese before you commit to buying a bottle.