Nate Haaz, 4, and his dad, Ryan Haaz, watch opera singer Aubry Ballarò singing from the balcony of Victor Cafe in South Philly. Ballarò performs “Quel guardo il cavaliere... So anch’io la virtú magica” from Donizetti’s “Don Pasquale.” Performances happen at 6:01 p.m. Thursday to Sunday.