At the Philly Pub Sing, instruments are welcomed, but not needed. One needs only to bring a song. To sing. To teach by ear.

"Ariana sharing, commenting and following basically confirming this is the pub she’s singing about, you guys are about to get BUSY," wrote another. The song paints a vivid emotional picture.

playing a set of acoustic songs — including one of the British pop star’s unreleased tracks titled “Old Phone” — in a Nashville pub. In one video posted to Instagram by the “Shape of ...