When you want a sophisticated, modern and upscale place to hang out, and you happen to own a big building, the decision is obvious.

That’s why on Thursday night RXR honcho Scott Rechler is opening an exclusive, invitation-only member’s club in the 32nd floor penthouse of 75 Rock.

Dubbed Club 75, the high-rise gathering place is seeking to expand its membership for business executives as well as members who are among the city’s thinkers, makers, creatives and changers.

Rechler partnered with Convene to design, develop and manage the 14,000-square-foot space that will host Club 75. Included will be gathering and amenity spaces, food offerings and some work areas.

“We have a beautiful library, dining space, a lounge, flex space and also large meeting and event spaces,” said Ryan Simonetti, chief executive of Convene.

In addition, Convene is working with tenants to meet their office catering needs.

Simonetti described members as “change makers” and entrepreneurs in the public and private sectors as well as in arts and entertainment.

“They will not only have an amazing place to go but will be able to have conversations about the challenges being faced by the community and society,” he said.

There are roughly 150 founding members, and once Club 75 gets rolling, it will be open to new members by application for $4,800 per year and to tenants at a reduced rate.

“It’s the continued drive to build the community not only in our building but in the greater platform RXR has in Greater New York,” said Bill Elder of RXR.

Both Brookfield and Durst are investors with Convenes along with Rechler.