i guess r/weightroom would be the best match. it has daily threads reserved for banter but is otherwise well moderated.

r/bodybuilding is pure meme, r/weightlifting pretty focused on the sport itself. r/fitness has a lot of questions by beginners who ask the same thing every single day. i don't know r/powerlifting, but i heard it's very memey too.

nah, imo r/weightroom is the best, but as a newcomer, please lurk for a couple of weeks until you learn the rules and culture.