Round1 Bowling & Amusement will open early next year at Holyoke Mall, management said Thursday. It’ll be the second Massachusetts location for Round1, following one in Taunton at Silver City Galleria. A Saugus location was planned but not built, according to published reports. Holyoke’s Round1 will be on the lower level above Cafe Square in 51,642 square feet. It will also be accessible from stairs on the upper level near Billy Beez.