Go to a bar? Perhaps one with interesting theme nights?
Do you have a hobby that isn't completely solitary? Engage in that hobby.
Actually talk to people (gasp! The horror!), rather than searching online.
If you see something interesting, go and check it out.
In my (not inconsiderable, I'm 55) experience, most people are decent human beings. And many locals love to show off the good things about their place.
So talk to people -- with a purpose:
"Where can I do $X?" (where $X == something you enjoy/have interest)
"I'm new here and want to meet new people who share $INTEREST. Any suggestions?"
I'm sure there are lots of other strategies too, but if you want to meet people, you need to, well meet people.