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Engage, the latest hookup site to spin itself as a social experience, doesn't want bisexual people. New users are prompted to decide if they want to be shown the profiles of eligible men, or women, only. Bisexuality may have gone out of style in the '70s, but what if you're just slutty? Even Facebook allows for wanting boys and girls at the same time. Maybe someone can offer the Engage crew a demo at their Love 2.0 pickup party tonight.