We visited New Orleans for a short weekend and part of my "Gotta See" lIst was the Cathedral. When we hit the Quarter Saturday morning, we stopped into the church to sightsee and take pictures. Since there were no official ceremonies at the time, we pretty much had the run of the church so were able to take pictures, sit for a while, and drink in the beauty and peace in this Cathedral.
We returned Sunday morning for the 9:00 Mass and got to enjoy the services in the church that we'd had the opportunity to make ourselves comfortable with the day before. The regular parishioners were very welcoming and there was plenty of room for everyone.
Our next visit to New Orleans will definitely include Mass at the Cathedral again.