And there’s tons of women at dance classes.
Clearly the activities they enjoy do not involve meeting women. For me, this translates to weight lifting (few women lift; if there are women, there is a trope for creepy gym guy and there isn’t much socialization outside of the men’s locker room) or coding (another solo experience).
Try new things. Try things that are social and are uncomfortable for introverts. It’s the only way you can find the results you want.
I want to stress just how difficult both of these things can be -- especially the second part. It's truly a journey where you end up changing your entire mindset to become a person who is going to make a good partner for another human being. You must not feel pressured to do it, or resentful that you are doing it. You must choose wholeheartedly to do it. It's going to feel awkward and strange along the way.
Women can tell when guys are doing that, and it's generally off-putting.
You should engage in an activity that you enjoy for its own sake. Don't take up dance class, for instance, if you aren't actually interested in learning to dance.
Don't "go looking for women". That is, don't try to be a pickup artist. Make an effort to be generally social, but don't focus just on the ladies. Be generally social. Talk to the men as well as the women.