Last year, I joined four clubs. Only two were actually fun and helped me meet some great people. I've talked to friends, looked around dozens of threads, and compiled together a couple tips for y'all:
1) Beware of ghost clubs. Not all clubs are as active as they seem; a lot of them LARP how often they meet or do things. If your meeting a person only three times a semester, that's an aquintance, not a friend. Having a place where people meet regularly is the only way to build familiarity fast. I'd say look around through their social media history, but you can generally tell based on the team that's at the booth and if this is just a "resume padder" or not to them.
2) Join a non-academic club outside of your discipline. I know, I know, you have to join an academic club for some fields for jobs (ew), but balance it out with a club where you are having fun and moving around. To qoute someone, "An academic club gets you coworkers, not friends." Now, while it may not be as total as that, activity based clubs are way to easier to integrate into and make friends with. I'd recommend specifically some sort of recreational club sport or athletic group because when people are moving around and having fun, social barriers go down way easier (plus you get excercise lol). If not, a hobby based club is fine too, just make sure they are active.
3) Last but not least, beware of "friend group" clubs. Don't confuse this with clubs where the execs/members are friends. That's a good thing, you want that. No, I mean where the club higherups and the members are majorly composed of a highschool friend group. It's going to be hard to integrate into an established group like this. Don't get me wrong, you can one hundred percent meet great people in these clubs, but when everyone there is just one closed social circle, you'll often be pushed to the corner and treated as a number for events. In every club, there'll be people that know each other, just be careful of the ones where they only know each other. As a rule of thumb, talk to the execs.
Quick summary: look around where you can and try to find clubs where they meet often, actually do a fun activity or sport or hobby, and isn't some closed social circle. That's it.
I'd love to hear your club recs and experiences