With a rhythmic salsa beat and distinctive horns, this song has become a fan favorite. It describes a dream sequence that Paul Simon had when he was a teenager of being a rock star (he's "under age in this funky bar"). It's late at night (evening) and he's hearing the radio as he falls asleep and the next then he knows he's dreaming about walking down the street and then playing lead guitar in a band. Smoking a "J" obviously refers to a joint (marijuana) which when he was a teen in the 1960s would be typical for a rock band.
Steve - Seattle, WA