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The members of The Third Sex, a Portland, Ore., lesbian trio, may prefer boys’ clothes, but their music fits easily into the grrrl-group continuum. Tidier than a lot of riot-rock, the band’s Card Carryin’ gets suitably edgy on songs with titles like “Time Bomb” and “Trouble.” Most striking is “Un Deux Trois Cat!,” which combines the Raincoats’ art-folk vocalese with surf-music propulsion. With Grendel at 8:30 p.m. at the Black Cat, 1831 14th St. NW. $3. (202) 667-7960. (Mark Jenkins)