Stylish and romantic, Casa B is a hidden gem in Somerville’s Union Square. Run by a husband and wife team of former caterers, the menu of shareable small plates mixes his Puerto Rican roots with her Colombian background. The result is a fusion of Latin and Caribbean flavors manifested in tablas (wooden boards of dips, cheeses, ceviches or other bites), pinchos (a different take Basque-style bar food like cod salad with guacamole and sauteed chorizo) and an impressive array of tapas. On warmer nights, get a table in the airy upstairs dining room with a view onto the square, or travel below ground for the larger dining area with date-night-friendly banquette seating and entertaining open-kitchen views.