It would have to have the whole decor on-point to where it feels like I am walking back in time to the 1920's/ "The Shining's" Golden Era. Obviously with modern conveniences (USB and USB-C, smart TV, etc) integrated in where they aren't obvious. A big thing I would need is a huge fancy ballroom-style room complete with ridiculously ornate old school bar, that they could feel free to use as an upcharge setting for whatever kind of dessert/ dinner party they wanted (enforce some kind of dress code too to keep with the theming). The cast members must have uniforms to match the ride though haha. I'm sure there's more must-haves but those are my first thoughts.
ETA Maybe make it the new home for the Grand Floridan Orchestra Society! Live swanky music would fit right in!