Upper end Restaurants with a private room in FLL
You might want to check into Fish, Riley McDermott's and 3030 Ocean. Also, I know that Samba Room has a private room but I haven't been there in years. If you're looking for a steakhouse, the Capital Grille at the Galleria has a few private rooms and they do a good job with large parties.
i have planned 10-20 such dinners at these places.
Timpanos - Private Room
Chima - They put you in a private area but not a private room
Trina - Private Room Upstairs
Fish - Private Room
Jackson's - Private Room
Johnny V's - Not Private at all
Blue Moon - Not Private at all
River House - Private Room
17th St Fishery - Private Room
Cafe Maxx - Private Room
Morton's in Boca - Private Room
Ruth Chris - Private Room