Sometimes people forget that rock music is supposed to be fun. If you’ve forgotten the danceable joy that rock ’n’ roll can be, Philadelphia garage soul rockers the GTVs are here to remind you. Rooted in ’60s Nuggets psychedelia, the organ-led quartet shouts and shimmies yesterday’s psychotic reactions for today’s wild things. The group’s new digital single featuring the one-two, hip-shaking punch of “Lingering Chills’ and “Emperor’s New Jam” is a succulent dose of groove-based, Sonics simplicity. Refreshingly imperfect, the GTVs bring their swinging medallions to En Su Boca on Thursday, Sept. 15. New Richmond band the Poison Ivy League dispenses its infectious tambourine-shaking toxins before taking the stage. Doors open at 8 p.m. Free. ensuboca.com.