Mounting the second installment of their debut production By the Bi, Blazing Change Players brings an amorphously piquant performance to this year’s International Dublin Gay Theatre Festival. As the title suggests, all matters bisexual are concerned. More interestingly, however, By the Bi is the only production confronting such issues within this year’s festival, the lone voice of its own middle ground. Having premiered a few months ago in the Virginia stomping grounds of co-writers and founders Caroline Downs and Morgan Barbour, this first stop in the show’s budding travelogue marks an important step in the fledgling theatre troupe’s beginnings. Both…