Another Britney hangout bites the dust. Sage, an alleged bistro on 24th and Park, looks shut down. There was a friendly notice from the landlord taped on the door about a lawsuit when I walked by last night. That's been a trouble spot on the othwise bustling Park AVe. So. strip of BIG schticky restaurants. The owners had operated it as Tan Da, hosting Britney Spears birthday party a year or so ago. Flop. Now this has flopped. Maybe something good will open in the space, finally.