Remind me, how does an adult make new friends in real life?

I've thought about approaching people like when I go on my outings solo but I'm sure people will think it's weird because, in this day and age, it's all about 'online'.

People would rather meet a stranger online than talk to another human who is also at the coffee shop, park, skating rink etc.

You know, I'm gonna try it one day soon and see how it goes.