The three times I was at Acme, I ate alone at the counter for lunch, early afternoon. Ate nothing but oysters and had great conversations with the older gentlemen shucking them for me. They loved to talk, and as long as I kept asking, they kept shucking. A perfect way to pass an hour or two.
That is good to know. When my daughter and I were at the Acme, it was peak dinner time and was crowded with a line outside. As I said it was not possible to conduct a conversation and whatever the waiter said, we couldn't hear either. Never had that problem at Felix's and the food is just as good, probably less expensive, and little or no line.
I think the Acme gets all of the high school tour groups visiting New Orleans since it is a spiffy-looking place. These groups tend not to go to Felix's which looks like it was last remodeled in 1953.
However the Acme has a nice website and if you sign up, they will send you some coupons (or they used to.)
There are many other great places to eat in New Orleans. I would recommend Johnnys PoBoys (for lunch or breakfast), Commander's Palace, esp. for lunch (they have a dress code and they do not hesitate to turn you away if you are not up to code), Superior Seafood on the St. Charles streetcar line, Ye Old College Inn (probably would need a taxi or Uber to get there and back) and Central Grocery for a muffuletta.
The only place we did not care for was the Gumbo Shop. Long wait and the food was not that good - wish we had gone to Felix's.
As for music, I will second the recommendation of Frenchman Street - lots of great places there. You can call places ahead and ask what their cover charge/drink requirement is. I would also recommend Preservation Hall. Also the Jazz Playhouse at the Royal Sonesta on Bourbon St. - in my opinion, it is usually the only good place for music on Bourbon Street but my wife might not agree. I think it is too sedate for her and she likes to watch the drunks.
Please keep in mind that these comments and suggestions are pre-pandemic. Hard to say what is going on now.
Hope this helps and hope you have a great trip. Please post a report to let us know how things went.