Taylor Swift ‘s “The Official Release Party of a Showgirl” opened at No. 1 at the U.K. and Ireland box office over the weekend with £3.5 million ($4.7 million), according to Comscore. Warner Bros.’ “ One Battle After Another ” ranked second with $2.7 million, pushing its cumulative total to $8.1 million after two weekends. Universal’s “ Downton Abbey: The Grand Finale ” remained sturdy in third place, taking $1.17 million for a total of $21.1 million. Nintendo of America President Doug Bowser