The legendary insobriety of their lead singer and a five-year breakup in the ’90s notwithstanding, the Pogues have always been as reliable, festive, and fueled by tradition as St. Patrick’s Day itself. Like the annual inevitability of that holiday (and usually timed to it), the Irish folk-punk band has toured these parts almost as regularly since reuniting in 2001, always accompanied by the inevitable questions concerning Shane MacGowan’s condition and his ability to deliver the goods.
That all-too familiar scenario may not be the case much longer. The group’s brief 10-date trek, which swung into the House of Blues Friday for the first show of a two-night, sold-out stand, is being billed as “A Parting Glass With the Pogues,’’ and band cofounder Peter “Spider’’ Stacy has claimed that while nothing is ever absolutely final, the eight-piece unit has no plan to return to the United States in the foreseeable future. And by any measure of logic, really, the end was bound to come sometime for a group that has not written new material or made (or desired to make) a new album in more than 20 years.