There was no shortage of help when Marcus Samuelsson and his wife, model Maya Haile, welcomed their nearly 4-month-old son, Zion Mandela, on July 19.

“Everyone in Harlem was engaged in some way because they’ve seen us through the pregnancy,” says the chef, who lives in the neighborhood and runs two of his 10 restaurants (Red Rooster Harlem and Streetbird Rotisserie) there.

“It’s a community where we’re on top of each other, but that’s great because it takes a village, right?”

Though sleep is sparse, the couple is adjusting nicely to life with a newborn. “Living together without a baby,...