Friends help each other when they're in a pinch

So… It’s a question that many adults ask - how do you make friends as an adult? 

I realize this is a common question. I also know there are some very obvious answers but I'm not sure if they work. Someone told me to join a club. So I did. I've meet some fun people but we've really only got the one thing in common. While I work with some good people, they're at different points in their life than me.I whining a bit but it's a concern of mine.  

I was trying to think of witty ways to discuss this but it's starting to bug me a bit.