Nantucket has a reputation for being something of a corporate hangout in the summer. Make that korporate hangout. Kourtney Kardashian has been out and about on the island in recent days, toting her children Mason, Penelope, and Reign on Nantucket's quaint cobblestone streets. Kim Kardashian's older sister was hard to miss at Cru Oyster Bar on Straight Wharf, lunching with her kids and their nanny. According to a person we talked to, no one on the island seems all that interested in keeping with the Kardashian. It's not clear where the 37-year-old reality star is staying, but she posted a picture of herself on the beach in a bathing suit that revealed that she (and on-again off-again partner Scott Disick) are expecting a fourth child. . . . We're told "House of Cards" star Kevin Spacey has also been enjoying island life on Nantucket of late.