Suggestions for a man past middle age?

I don't know how to put this but I'm fairly stuck and lonely I have a good job I live well but I don't do anything I don't go anywhere. Divorced my wife of 8 years last year and we're still friends. But I have relied on her friendship to go to concerts and do s**t and now I realize that's just not healthy.

How does a man of my advanced years reach out and meet new people?

Edit: I'm old but not hideous lol