The World War II museum is worth seeing and is only getting better.
I can't believe no one has mentioned Gallatoire's on Bourbon Street, it's a New Orleans institution. Commanders Palace is an institution too. Emerils is really good as is Coquette on Magazine Street. Meaux bar bistro on rampart hangs under the radar. I like the Bon Ton which is more downtown where they have great Crab Au Gratin. For a great lunch, stop by Katie's in Mid City. It was featured in Diners, Drive Ins, and Dives.
If you're going during Carnival, you would enjoy that. The weather can be iffy for golf that time of year. When it gets chilly down there, it's a bone chilling kind of cold. It's so damp and blows just enough that it goes right through you. With that said, if the weather is good, Metairie and NOCC are nice courses and both are pretty tough to gain access without a member in the group.