The couple met in 2012 at Barry’s Bootcamp in TriBeCa, where Ms. Langham–Schwartz was working as a manager (many Rockettes who live in the city year-round teach fitness and dance classes during their off-season). Mr. Schwartz was a regular at the 8:20 a.m. class and often stopped to chat after working out.

$8,595 | hudson Yards, Manhattan

Heather Langham–Schwartz, 38, and Nicholas Schwartz, 35

Rent: One month free brings it to $7,878 a month.

Occupations: Rockette, dance and fitness teacher; corporate lawyer

Requiring study: The apartment came with a stack of manuals on how to operate the high-end appliances and electronics systems. After a year of practice, the couple say they seem to have mastered them all.

Their friends: “Couldn’t be more different,” said Ms. Langham–Schwartz. “Which is nice. The whole Radio City world is fun, but he brings me back down to earth.”

The building’s amenities: Are a regular destination. “It’s nice when the weather is bad and you don’t want to go anywhere,” said Ms. Langham–Schwartz. “It’s like a spa.”

When she told him it was her last day at the fitness studio, he invited her and a colleague to his building’s rooftop for drinks that evening. “I was about ready to move back to Arizona when I met Nick,” said Ms. Langham–Schwartz, who was living in a no-frills Harlem one-bedroom at the time. During her first few years with the Rockettes (she joined in 2009), she would go back to her home state during the off-season to resume her frugal life. About six months after meeting Mr. Schwartz, she gave up her lease and moved into his TriBeCa apartment.

“Moving in there, I felt spoiled. Moving in here, I felt very, very spoiled,” she said of One Hudson Yards. She loves the washer and dryer in the apartment, the huge walk-in closets and the deep soaking tub. And from behind their sound-dampening windows, they’ve both enjoyed watching the construction of the Shed, the cross-disciplinary arts center rising directly outside.