The working class as a subject for drama has caught on since Donald Trump was voted into office—although prescient playwrights had cottoned to the richness of the issue well before the election. Lynn Nottage’s Sweat, presented at the Public Theater in November, is moving to Broadway next month, but it had already been in the works a year before. James Anthony Tyler’s Dolphins and Sharks, now at the Labyrinth Theater, is equally worthy of notice. Although the Labyrinth production is billed as a world premiere, Tyler’s play has been in development since 2015.