In the 1950's era in Bristol Zoo's birdhouse there were Ring-tailed(breeding) Mongoose and Black Lemurs, but nobody noticed them much- feeding the macaws chained on perches was the draw in there. And of course in those days Bristol had virtually everything in the megafauna line (apart from Hippo)- Elephant, Rhinoceros. Giraffe, Camel, Zebras, all the big cats, three ape species, deer and antelope, a large collection of Old World monkeys, a colony of Rhesus macaque, four-even five, Bear species, wolf, sealion, kangaroo etc- the bird, reptile and fish collections were largely back-ups to all that.
I can't remember when I first saw a meerkat in a UK zoo. I think a few places had them but nobody recognised the name, just some 'small mammal'. The very first T.V. documentary that brought them to public attention was called 'Meerkats United' (forget date- 1980's I think).