Yeah.. some cats like weed, SWIM had a cat who would walk up and demand a bit of pot smoke blown in his face, after a while the cat stopped asking for it though. Cats seem to self-regulate quite well. My cat won't go for the catnip everyday but on occasion she goes crazy when I pull it out. she gets excited about the smell of grass but that's it. Man does she ever hate the smell of tobacco tho.
I couldn't imagine going to the zoo high. I'd probably have to leave. Some zoos are better than others, but some, tiny cages with ruts/paths along the fences where the tiger paces back and forth all day
I actually mostly had a lot of fun with my cat when tripping (luckily she wasn't too demanding).. amusing visual distortions aside, I would start noticing the cat's particular unique mannerisms and idiosyncrasies in the way she does her day to day activities.. start relating that to how humans develop mannerisms and vica versa.. At some level it illustrated to me in a way I found quite humorous, how living things on this planet are really all made from the same stuff..