We are looking for a place for 22 people to east Chirstmas dinner in New Orleasn. Any suggestion of someplace that might be open?

Lots of restaurants are open for Christmas in New Orleans! A few places I'd suggest starting with are Commander's Palace and Palace Cafe and Mr. B's.......all have special menus for the Holiday Season.
If you're going to be going out while you're here please read below......

Bourbon St. can get kind of raunchy at times....ok...most of the time it's ranchy.....BUT there's a new entertainment venue on Bourbon St. that's going to be a HUGE hit! It's call Theatre Fleur De Lis. They just opened a couple of weeks ago.

Located in the 300 block of Bourbon right across from the Royal Sonesta hotel, Theatre Fleur De Lis is a throwback to the classic days of burlesque on Bourbon St. This is a VERY upscale place with beautiful and talented dancers from around the globe performing in a world class burlesque show in a multi-million dollar renovation of a historic building.
Located just above Rick's Cabaret, it's a great 2.5 hour show that features several acts/routines by professional dancers.
I went with my wife last week and it was one of the best 2 ours of entertainment we've had in quite some time.
It's not inexpensive....but it's worth every penny.
Call (504) 529-SHOW for showtimes and reservations......
And, no...I don't work for them. I just think it's a good investment in your entertainment dollars while you're visiting New Orleans!