What do the Public Radio Exchange, WGBH in Boston and the Nine Network in St. Louis have in common? All have recently made significant investments in brick-and-mortar facilities for public engagement. On this week’s episode of The Pub, we talk about why public media organizations would want to reach people in person instead of over the air — so much so that they’d build a facility in which to do it. Plus, host Adam Ragusea offers a metaphor about what public media can learn about community engagement from religion ... by forcing his audience to sing together.