"They have a free shuttle that picks up at the corner of chestnut and federal on weekends. The driver is a very nice older guy. Check their website for hours. (The panel van is on chestnut itself next to the Nantucket information bureau, which also has bathrooms on the backside of it.)
When you get there, they card you and wristband you. The taproom is two lefts after getting through the entrance. Lots of lagers and ipas, which makes sense since they're probably most busy in the summer. The left 8 are their classics, and the right 8 are seasonal/experimental. I flighted all 16 over the course of 4 flightboards. It's about $4/taster, which is NYC taproom prices. Beer was just okay, but if you're here with a ton of friends and there for some live music, who cares I suppose. Their classic beers are easy to find around the island, so coming here to get some isn't a must IMHO.
They have 3-4 food trucks that have various food. I tried some veggie dumplings, but was unfortunately underwhelmed and decided to save my stomach for dinner.
Shaker-style Pint glasses are $12 and stickers are $3 from the gift shop. Kinda steep, but its Nantucket and they know their typical audience wont blink.
Overall, the ambiance is fine, BYOFriends, and know that the beer doesn't hold a candle to the NYC scene."