You better hope Celine doesn't harbor any resentments toward Pepe about that time the latter dared him to lick a frozen flagpole, because any unresolved tensions between these brothers could blow apart one of the most famous family ensembles in classical music. The Romeros also includes two sons, Celino and Lito, and together this fraternal quartet has distinguished itself both for its original compositions by patriarch Celedonio Romero and pieces commissioned by Rodrigo, Torroba, and de Madina. They perform at 8 p.m. at the Morton H. Meyerson Symphony Center on Flora Street in the Arts District. Tickets are $50-$100. Call (214) 528-3733.