Where are you staying?
My favorites are Le Cellier Steakhouse, Monsieur Paul, The Yacht Club Steakhouse, Tiffin's, Citrico's, Jiko's, Narcoossee's, Topolino's Terrace, Ravello's and Il Mulino. Those are all about quality food.
But for fun, I like Akershus, the Biergarten, Hoop-Dee-Doo Musical...