They had a killer brunch and an interesting evening show. You can still rent out some of the modular space up there (those not in use by CG, of course) for private functions.
They also had a great daily breakfast buffet besides the champagne brunch on Sunday. That breakfast buffet along with the one at Papeete Bay Verandah were both great!
Top of The World at one time had a Broadway style show, singing and dancing and such. They then , (or was it before, lol), went thru a period where they had 'name' acts appearing. I was there with my family when I was a kid and we saw Kreskin perform.