Castle Island Brewery is pet-friendly. The taproom features 16 lines of the freshest Castle Island beer anywhere, set in an industrial-yet-cozy beer hall environment, complete with communal tables, board games, and a warm, welcoming staff. Dogs are welcome to join their owners at this popular brewery. Hungry hounds can enjoy something from one of the food trucks that visits. Castle Island Brewery is open Monday to Tuesday from 4pm to 10pm, Wednesday to Thursday from 11am to 10pm, Friday to Saturday from 11am to 11pm, and Sunday from 11am to 8pm.