Sophisticated venue serving fish-focused Mediterranean fare, plus a bar with occasional piano music. Ostra, located at One Charles Street South in Boston’s Back Bay, is a contemporary Mediterranean restaurant. Inspired by local and European varieties of seafood, Chef/Owner Jamie Mammano and Executive Chef Mitchell Randall focus on specialty seafood found throughout the Mediterranean and regions within the U.S. The light preparation of our cuisine highlights the natural and fresh flavors of each dish. The dining room at Ostra evokes a sense of style and sophistication in a comfortable and inviting setting. Ostra also offers a fine bar and lounge area featuring live piano entertainment. Ostra’s private dining room accommodates up to 42 for a seated event and up to 70 for a cocktail reception.