re: looking for ideas for a post-rehearsal cocktail party in NOLA.....

I think that's a best idea also. I understand the munchies because everyone there had already had dinner. Some after dinner cheeses might be a good addition for something like that. Sounds like a fun deal for out of town guests.
Might be able to do something like that at the Royal Sonesta. Maybe a few connected hospitality rooms with balconies. Would probably need the hotel to cater if there are no locals. Would be fun to have a caterer being Nola/LA foods in.