On a recent evening in Coolidge Corner, as rush hour traffic flooded down Harvard Street and the T ferried passengers to and from the city, the unmistakable notes of opera drifted out of an alley in ...

If you’re in Coolidge Corner Saturday afternoon, you might hear the operatic longing of “O mio babbino caro” or the friendly warmth of “Somewhere Over the Rainbow.” Opera on Tap Boston, an ...