South Shore-formed and Rhode Island-based Good Trees River Band, frequent flyers in Worcester, have a new record out, “Blowin’ Smoke,” that’s full of easygoing jams, energetic beat switches and the occasional political allusion. The album kicks off with a guitar riff over a Grateful Dead-like drum part that announces the title track, narrated by lead singer Gavin Gebhart as a con man who promises the world to wide-eyed marks by telling them that “opportunities like this, they come only once.” “You could spend your days in the same streets you were born/Or you could spend your days lusciously adorned/In the...