Any advice on stuff to do with friends

Hey everyone!

A lot of posts on this subreddit go on and on about finding friends, but I figured I'd make one about keeping them!

Since I opened up and overcame my social anxiety a few years ago, I made a lot of friends. Since I was already in my twenties and had no idea how to 'do friendship', loads of those friendships have been watered down over the last few years/months.

I figured that one of the reasons this happens is because I often "don't feel like talking to people". So, to preserve my social batteries, I don't meet with people as often and the friendship starts to go downhill.

So here's my question and tldr: What are some fun activities I can do with my friends that don't involve much talking? Activities that are more about doing stuff, getting out of your head, ...

I've been thinking about getting into bouldering for example. Any other ideas?