The Rock and Roll Rumble has already sent PowerSlut, Brix ‘n Mortar, Blindspot and wild card Corner Soul to next week’s semifinals, but the preliminary rounds close out Thursday through Saturday at Once Ballroom with four bands per night. But other local outfits put this weekend’s spotlight on the Plough & Stars, the cozy bar on the south side of Harvard Square that’s toasting its 50^th birthday. Will Dailey does Thursday’s honors, Vapors of Morphine echo the legacy of Plough regular Mark Sandman on Friday, and Saturday wraps up with a 4 p.m. matinee with Josh Lederman’s all-stars and a night show with the Ray Corvair Trio and Andrea Gillis. Boston dance-rockers Juice also pump up Brighton Music Hall on Friday, while Zimbabwe’s Afro-fusionists Mokoomba energize a World Music/CRASHarts show at Somerville Theatre and Blue Oyster Cult reap their rocking hits at the Cabot in Beverly. More cowbell please — or not.

Nick Mason wasn’t the best known member of Pink Floyd, but that pioneering British band’s best known period isn’t what came before Dark Side of the Moon either. That’s the repertoire – much of it from the Syd Barrett days — that the drummer resurrects with his worthy new outfit Nick Mason’s Saucerful of Secrets, which plays the Orpheum on Saturday. For another heady musical experience from a different world, check out eclectic Ukrainian folk-punk group Dakhabrakha, which plays a World Music/CRASHarts concert at the Somerville Theatre the same night.

Ruminative English space-rockers Spiritualized, led by singer/guitarist Jason Pierce (pictured), floats into the Wilbur on Sunday behind 2018’s And Nothing Hurt, the group’s first album after a six-year absence. Primus bassist Les Claypool and guitar scion Sean Lennon conjure psychedelic soundscapes of their own in the Claypool Lennon Delirium at House of Blues. And Sunday also offers a Celebrity Series jazz date with the Spring Quartet, where bassist Esperanza Spalding (who originally had a scheduling conflict) joins a crack lineup that includes saxophonist Joe Lovano, drummer Jack DeJohnette and keyboardist Leo Genovese at the Berklee Performance Center.