The husband-and-wife duo Ben and Kassie Wilson, who go by the name Goldpine, will perform “aggressive Americana” harmonies at Flat Iron Crossroads at 6:30 p.m. on Saturday, April 18, at 7709 Flat Iron Road, Gloucester, according to a release from the venue. Gates open at 5:30 p.m. with the Shore Bites food truck and wine and beer at the FIX Bar. Tickets are $20 online, available at flatironcrossroads.com, or $25 at the door. Physical tickets are not distributed. Names will be on the guest list at check-in. Children 12 and under attend free of charge....