For example,
Primarily Primates, Inc., which housed several retired research chimps, is apparently a pit of despair.
Also, facilities that receive federal funding such as
Chimp Haven must return animals to laboratories if they are requested to. In my book, that's not really retirement.
Project R&R has a
list of sanctuaries that can take animals, and notes which have received funding, and I assume approval, from them.
Personally, after watching
Chimpanzees: An Unnatural History on PBS and getting to "know"
Gloria Grow, I think
the Fauna Sanctuary is truly a place that's earned it's name.