Local shoegaze outfit Silver Shadows headlines this month’s edition of Commune Wednesdays, Pop Gang Records’ monthly, free concert series at Elbo Room in San Francisco’s Mission district. On its self-titled EP, the quartet cultivates a lush, dreamy sound, swathing listeners in washed-out, atmospheric guitar riffs that contrast with its sprightly rhythm section and incisive vocals. Quaaludes, another all-female four-piece band from San Francisco, joins Silver Shadows on the bill. Quualudes often uses its punchy pop-punk anthems to take casual sexism to task. Its last release, Nothing New, features bursts of high-energy tracks that attest to the group’s penchant for concise, hooky songwriting. Skin Peaks, another female-fronted punk band from Chico that recently released its excellent, lo-fi, Americana-tinged cassette AA5, is also on the bill.