As exotic as its español title, the 1960 Mexican camp fantasy La Nave de Los Monstruos materializes that best-selling saying: Women are from Venus. In this amusing mishmash of science fiction and Westerns, the last man on said planet (poor fellow!) has expired. The ultra-voluptuous rays of hope are Gamma and Beta (two would-be Miss Universes in one-pieces), who go intergalactic trolling for specimen — all space oddities — with their robot Tor, a Gort gone lucha libre. Earth itself is reduced to Chihuahua, where the two sirens come to a plot-altering impasse. Tonight, in lieu of the film's norteño soundtrack, the post-classical string quartet Ethel teams with art rockers Gutbucket for a splendid, long-incubated live score.