LOL, this obsession people have with dancing. This is horrible advice. Find a club or social scene doing something you like, don't pick up a random hobby you don't like just to "meet people".
I just share how I successfully meet and connect with women.
Dancing is the language of the body. I don't like small talk and am probably a introvert, but by dancing - connection comes easy and natural to me (at the right place).
Besides, the village dance was the traditional way for couples to hook up. And before that, there was the tribal drum.
Dancing is good advice because you have a good mix of genders and it's something you can grow to love over time. It's also a great community that's fairly welcoming once you start going regularly. Take a class and you automatically have a social group of other beginners.
The problem with nerds finding a social scene for what they already enjoy doing already is that there's a very good chance it's going to be a male-dominated activity. Going to a tech meetup or a board game night is a decent way to make friends, but not so much a mate.