Broadway is not the be-all, end-all for theatre, as resident theatres across the country can attest. And even in New York City, some of the smartest and best theatre happens in basement black boxes rather than gilded Main Stem houses. But New York’s booming commercial theatre district couldn’t exist without nonprofits, both in Manhattan and across the U.S. Our April issue looks at the ways in which nonprofit resident theatres, and the artists and theatremakers who work in them, are staking their claim, both on the actual avenue and in terms of their influence from afar.