The super-cool Lola Staar boutique on Coney Island has a holiday gift that could save a lot of sensitive girls who like to sing showtunes at piano bars a lot of heartache: a keychain-size gaydar detector. Gay, straight, and even curious targets are identified. Sample result: "Hmmm … that's a maybe baby … this one's still deciding!" Uh, so are we … whether we should invest in this or just keep sticking with our friends who work in retail and event planning. [Kinetic Carnival]