In their four-story townhouse in the West Village, Marlies Verhoeven and her husband, Jacco Reijtenbagh, have amassed a collection of contemporary art that’s notable for its mixing of artists who are known quantities, like Cecily Brown and Rashid Johnson, with new names such as Royce Weatherly.

The 60 or so pieces are all placed just-so in a sharp, modern design scheme.

Ms. Verhoeven, 37, is the co-founder of the Cultivist, which she describes as “a culture club meets arts concierge service.” The Cultivist charges members a fee and gives them special access to art-world doings. So she interacts with other collectors all the time, and has a good bird’s-eye view of her own trove.

“Most of the work is conceptual in some form,” said Ms. Verhoeven, who used to work in the marketing department at Sotheby’s. She noted one other trait of the collection, which she attributed to her European upbringing (she is of Belgian descent): “There’s a lot black,” she said. “Maybe too much.”

The most prominent example is a black painting executed in tar and feathers by Dan Colen in the living room, “hippity flippity!” (2012), which hangs above an oversized sculpture of a pen by Johannes Albers.