Yes, meerkats actually do that standing up thing. So do prairie dogs. Nieces not so much.
I'm trying to think of how many zoos I've been to. Not many. As an adult I've gone to the San Diego Zoo once, the Cleveland Zoo once, but that was only to see the newly opened rainforest, and the Central Park Zoo a few times with visitors. There was the Catskill Game Farm when I was a kid. I also remember going to the very awful zoo in Watertown, New York. The only clear memory I have of that is of people throwing gum and marshmallows to the bears, who would then chew and chew and chew. I think that's it. I'm not much of a zoo person.