hey homie, there is no hard and fast rule about what must be posted where, but i think generally the people subbed to this Entertainment community are looking for posts about “Movies, television and Broadway”, as it says in the sidebar. Generally, most us are sharing memes in the Jokes and Humor community, unless the meme is about something specific to a community (anime meme in the anime community, etc.). Again, you can post whatever wherever, but i think you’ll tend to get more reactions on a post if you post it in the most appropriate community.