An immersive dinner-and-screening night inspired by Mamma Mia! arrives Saturday, Feb. 7, at Seaport Inn. Doors open at 6 p.m. Screening begins at 6:30 p.m. An ABBA dance party follows from 8:30 to 10:30 p.m. Tickets cost $65 and include one drink. Tickets are available through Cheddar Up.