@JBZ - I think I've never been to a lemurless collection!
I still have never seen a raccoon

the vast majority of places keeping the species are smaller collections which are either not worth my visiting purely for the one species, or too far away to reach without a lot of time and money wasted!
And the one collection listed as keeping them on Zootierliste which I have visited - Bristol - seems to no longer have them onshow
In terms of species I could stand to see a lot less of, my personal top three would be:
Meerkat
Short-Clawed Otter
Ring-tailed Lemur