It would be ceremony, dinner, dance. Fishbone is just refering to the dance portion being open to the public.
I live only an hour away from Fishbone and I've never heard of it.
Her brother has decided that it will be open to the public. Not my thing, but if that's what he wants, I agree with her, that's fine.
It's the, not picking up the tab for your invited guests to enter the dance, that I don't agree with, neither does Fishbone.