With its bi-level bacchanalian proceedings, this landmark Irish pub draws revelers away from the Old Port.. In Short Housed in a distinct red barn, the Brian Boru is hard to miss. Its second-floor deck provides patrons with panoramic views of Casco Bay and the city's skyline. Whiskey and bourbon connoisseurs select from one of the city's finest selections, though most customers settle for a creamy pint of Guinness. A small second-floor stage hosts lively cover bands on the weekends. The varied food menu includes a Southern catfish dinner and citrus grilled chicken wrap.