Why is it so hard to make friends in LA?

I'm a late 20 something and have been to all sorts of interest groups, events designed for making new friends, used Bumble BFF, etc. I've made a few of friend and would really like to make more. Any tips, esp with the lack of third spaces?

Edit: Whoa, this blew up! Thank you for sharing your thoughts and advice. Y'all know some rad places/orgs!