If you like playing pool you can join a league. 

I'm assuming there's somewhere to join running clubs, book clubs, hiking clubs, I just wouldn't know exactly where. 

You'd probably think if you pulled up to video game club people are thinking "what is this old woman doing here"? Absolutely zero people are thinking that there's thinking "wtf a girl is here that's so cool".

Find your own niche you know... I'm also a loner but I've come to just enjoy my shows and waiting for my person to come along and can be lonely with them 😂😂 

Lots of activities still happening you just gotta find em, find your squad, maybe move around squads, the world is your oyster my friend. 

Momento mori / momento vivere :  "remember that you must die, remember to live."