Flex-warehouse startup ReadySpaces has inked a 90,000-square-foot lease at Isaac Chetrit’s industrial loft building in Ridgewood, Queens. Led by co-founders John Zimmerman and Kevin Petrovic, the company has been growing its footprint with long-term leases on or purchasing large Class B and C warehouses. ReadySpaces has more than 20 locations in North America, spanning more than 2 million square feet. But the recent lease at 59-10 Decatur Street marks its first in New York City. Just like WeWork in offices, ReadySpaces partitions its warehouses and industrial buildings into smaller units — ranging from 250 to 5,000 square feet — for its clients to use them on more flexible terms than traditional leases. David Junik and Steve Nadel with Pinnacle Realty represented the landlord for the transaction. The brokers declined a request for comment.