Any Louisianan would tell you that some of the best po-boys are served up in unsuspecting holes-in-the-wall. Calliope's holds true to this tradition. Nestled in an unassuming strip mall, Calliope's serves up po-boys that have been praised by Louisianans and Houstonians alike. Try the sliced roast beef po-boy covered in brown gravy or the oyster po-boy bursting with crispy battered shellfish.