Complex sentence: As many as 10 or 12 people would come to the house for Sunday dinners, and the Terpenys' island neighbors would often visit to play whist, to sew, or to dance.
Split into simpler sentences: As many as 10 or 12 people came to the house for Sunday dinners. The Terpenys' island neighbors would often visit to play whist, to sew, or to dance.