To that end, he brought in people like Sylvester Onyejaka and Jay Jennings.

Mr. Onyejaka, or Sly5thAve, 27, plays the saxophone for Prince’s New Power Generation and recently performed on “Late Night With Jimmy Fallon.” He has now exchanged his basement bedroom at the house for an apartment in Crown Heights, where he lives with his girlfriend, Kate Pritchard. A former clubhouse member, Ms. Pritchard is the marketing director at BKLYN1834, and despite having left the house, the couple still spends a lot of time there.

Mr. Jennings, 30, plays trumpet for the country music star Toby Keith and recently won a Grammy Award with his jazz band, Snarky Puppy. “When I first came I slept on the floor,” he said. “It was before they had a couch on the first floor, so I just put a mattress down; I was in a bit of a pickle at the time and the Clubhouse took me in.” That was in 2011. Mr. Jennings has since relocated to a sprawling bedroom on the second floor, with a large bed and a wall painted various shades of blue. “One of the most special things about this place is the neighborhood,” he said. “It feels almost like a suburb of the city. You tell people you live in New York City and they have this picture of a small studio apartment, but it couldn’t be farther from the truth.”

“It is pretty much a dream to live here,” agreed Daniel Garcia, 28, who moved in several months ago with Mr. Sadler, who calls himself Cade; both are members of the rock band Foe Destroyer. The band settled in New York in part because it is arranging and playing the music for “Fly by Night,” a new musical that is being prepared for an Off Broadway run this spring at Playwrights Horizons. The musical, which has a “Sonic Youth-y, washed-out feeling,” brings a new dynamic to the house, Mr. Garcia said. “It’s the whole theater circuit thing,” he said, “and if it does well, it could go to Broadway, so that’s cool.”

While all this unfolded, the partners in BKLYN1834 — the name is a nod to the year the borough was incorporated as a city, before merging with New York, and to the 18-to-34-year-old demographic the company will target — had been searching for a focus. “Three years ago we started thinking about BKLYN1834, but we weren’t sure, would it be a retail business? Or possibly a magazine about the Brooklyn underground scene?” Mr. Markman said. Then, roughly 10 months ago, a friend of Mr. Quinn’s introduced the founders to Mr. Reid. The group had a meal at Dellarocco’s Brick Oven Pizza on Montague Street — Mr. Markman is a co-owner — and Mr. Markman took Mr. Reid to a Nets game at the Barclays Center.

“It was cool. I had never been courted like that before,” Mr. Reid said. “Glenn is very good at it.” Not long after, Mr. Reid became the company’s creative director, and BKLYN1834 hired a handful of other Clubhouse members. Aaron Vazquez, 26, is the company’s art director. A photographer and video director, Mr. Vazquez was born in the United States but grew up in Coahuila, Mexico, where his father still lives. In 2011, he dropped out of the University of Texas and moved to New York, staying with friends before making his way to the Clubhouse. “I saved up $500 making music videos for some friends, and so I sublet Jay Jennings’s room while he was on tour,” he said. “Then I stayed on the couch for a while, until a room opened up and they asked me to become an official house member.”