CIMG6521 A congoer in a yellow-and-grey costume Posted onJanuary 1, 2022January 1, 2022 ApolloCon 2007: Saturday: masquerade, hall costumes, and miscellaneous pictures 800 × 887 CIMG6521 A congoer in a yellow-and-grey costume CIMG6521 A congoer in a yellow-and-grey costume at ApolloCon 2007 ApolloCon used to be a speculative fiction convention in Houston, Texas.