But apart from the name—Grace in Growlers—there are few hints that quaffing a pint here serves a higher purpose (we’ll come back to that). More to the point are the 15 taps calling for your attention. Here’s how it works: You open a tab at the host station, swipe the wristband you’ve been issued to activate a tap, then fill a 5-, 10- or 16-ounce glass with whatever you like. Once you’ve poured 36 ounces, the system cuts you off. But you can always fill a growler to go.