As its slightly goofy portmanteau name indicates, Martuni’s is all about compositions, both on sheet music and in cocktail glasses. Every city needs a piano bar, and because it lies within walking distance from the symphony-opera-ballet complex, it’s where you’re likeliest to find performers and patrons coming together after a show. (And regarding those martinis, they’re served by genuine cocktail servers and they err on the side of spine-stiffening.) Whether it’s Cole Porter standards, a jazz night, or a true sing-along, this curtained, Art Deco-accented bar is where tried-and-true Friends of Dorothy can be found.