FIVE YEARS AGO, Anne Washburn headed to the Texas Hill Country for a ten-day silent playwriting retreat at a refabbed ranch, where she cranked out the first draft of “Antlia Pneumatica,” currently up at Playwrights Horizons. The ranch’s owners, “big Beckett fans,” insisted that the writers stop for dinner, on their drive down, at a roadside joint called Rudy’s. “It seemed like a good intro,” Washburn recalled the other afternoon, at Morgan’s Barbecue, in Prospect Heights. “You take a bunch of mostly New York playwrights and you drop them into Texas, which many of them were sort of apprehensive about. But the first thing is barbecue, and they’re kind of, like, Ooh, because barbecue makes people feel safe.”
Washburn, who is from Berkeley and now lives in Brooklyn, gestured around…
