Along with its across-the-street competitor Game On! (82 Lansdowne St.; tel. 617/351-7001), “The Cask” is busiest when the Red Sox are in town—the team plays at the adjacent Fenway Park—but lively year-round. Gigantic high-def TV screens at every turn and an outdoor urban patio make this a fun option if you don’t want to spring for pricey baseball tickets—you can hear the roar of the stadium crowd just fine. Come early for a seat on game days.