*Infinitesimal Opera* arrives at National Sawdust as a live rock/pop opera staged in one of Brooklyn’s key new-music rooms. The run moves through a rotating bill that includes Britton & The Sting, Lola Kirke with Odetta, Storey Littleton + Calder the Destroyer, Black Belt Eagle Scout and Mato Wayuhi with Ailani, Bruce Brubaker Live!, and a Friday the 13th dance set with DJs Eli Escobar & Cosmo. If this is an NYC premiere, the program reads less like a single narrative than a city snapshot, treating the opera form as a container for scenes, voices, and nightlife. The result is a documentary-like cross-section of contemporary New York performance culture.