It was the late ’70s again in the Hamptons Saturday night at a Studio 54 bash thrown by real estate moguls Harriet and Steve Croman. The party was based on the famed club, with performers including Chic, bottle service and a drag Grace Jones. We’re told the couple had planned to throw the bash at their home in Sagaponack, but after complaints by neighbors, event planner Pat Glenn found a spot on farmland in Water Mill. Costumed guests dancing under a tent included Alison Brod, Jason Binn, Rosanna Scotto, Chris Wragge, Michael Hirtenstein, Donny Deutsch, Jeff Zucker and Charlie Walk. We’re told the police showed up to shut down the party at 1:30 a.m.