I take a cruise around Halloween with a large group of singles via a company that specializes in this type of trip. I had never been to New Orleans and a few tips there: taxi or Uber is fastest but also most expensive so use the airport shuttle if time is not an issue. As for the city visit the old, whole in the wall places if you want a real taste of New Orleans cuisine and sample the beignets, a delicacy that has powdered sugar as a breakfast or dessert best served hot and 3 for $3. Its a square piece of floury dough friend and covered like a light pastry or doughnut sold all over New Orleans. Port is very close to the downtown area but its cheaper and quieter if you stay in either the business or garden district and walk to Bourbon Street. At night Bourbon Street becomes a walking venue of bars,restaurants and shops a a gay section on the north end of Bourbon Street. Drinks tend to be a bit pricey ($6 beers, $8+ mixed drinks) but lots of historic places throughout the French Quarter and Decatur Street. Louis Armstrong Park has free music on Thursday nights from 4-8 pm and there are lots of great live music stops.
As for our ship: the Dream is being renovated and the martini bar has been taken out in place of more casual seating outside the piano bar. This bar and the casino bar (which is now a combo casino and sports bar) allow smoking which I avoided as much as possible as I don't do well with smoke. If you want sports the casino/sports bar is the only option unless they show on the big screen on the Lido Deck/Deck 10. I always make use of the steam room and the sauna which on are deck 12 forward ( go through the pool area moving forward via Deck 10 then take stairs up 2 flights or the elevator, steam room is in each locker room and there is a shared, coed clothing required sauna in the attached hall way. Fitness Center is open 8 AM -10 PM for those wanting a work out or use the walking track outside on Deck 12. Serenity adults area is on Deck 14 forward with hammocks and day beds no kids are supposed to be there.
Dining: do breakfast in the formal dining room as the buffet is so/so for breakfast. After 1st formal night do dinner at the buffett food is just as good, plenty of it and not in the small portions that are now in the formal dining room. Lunch pool side still works great still a good selection most of the day.