Vornado has more on its to-do list than remaking the Penn Station area along with Madison Avenue and East 59th Street.

The real estate investment trust led by Steve Roth is re-tenanting a petite retail building at 715 Lexington Ave. — across 58th Street from the Vornado-owned Bloomberg tower and a block south of Bloomingdale’s flagship store.

The 23,000-square-foot glass and steel jewel-box sits on the southeast corner of East 58th Street.

Here, area spies tell us Casper, Santander Bank and Orangetheory Fitness may have signed deals to fill the ground floor spaces that New York & Company and Zale’s previously vacated.

Since retail rents have dropped 10 percent to 20 percent all over the city, Orangetheory was able to lease New York & Co.’s prime corner, along with what had been lower- level storage, for a new flagship location.

The fitness outfit, which has several spaces all over town, will use its space for a flagship showcase to market to potential franchisees, sources said. Evan Schuckman and Craig Gelberg of Ripco Real Estate represents Orangetheory.

The former Zale’s space was sliced up, and part is being leased by Santander Bank, which was represented by Ariel Schuster of Newmark Knight Frank.

The other portion of Zale’s is getting a Casper. The clicks-to-bricks mattress outfit was represented by Matthew Siegel and Mitchell Dearman of Lantern Real Estate Advisors, while Ed Hogan, Jonathan Morrison and Lucy Phillips represented Vornado in-house.

A Casper spokeswoman said she doesn’t “have any information to share.” The others did not respond to requests for comment.