There used to be a Sheraton in Auckland in a great location for going out at night (up the hill), but it was reflagged.
The address was 83 Symonds Street, Box 2771, Auckland, New Zealand.
It is the Langham Auckland Hotel.
Do a search and you can still find a link for the Sheraton Auckland.
http://sheraton-auckland-hotel.hotel-auckland.net/
Too bad. But I think many hotels in NZ and Australia don't want to pay the high management fees that the big US chains charge. The Sydney Marriott changed to Pullman a few years back.