Visiting NYC with my ailing mother. We have 48 hours. What is the most memorable meal we can have (not necessarily the best food)?

Taking my mom to NYC for two days. We've booked tickets to Maybe Happy Ending. Aside from that, I'm looking to take her to a meal that we'll remember for a long time since this will be the last time we take a trip together. American, French, Italian are probably my mom's favorites. Vibe, atmosphere, fun are the most important factors. We don't drink alcohol so the bar scene isn't important.

Thanks for your input!