Basically join hobby groups. Not sure if meetup.com is much of a thing any more but they had tons of different types of meet ups.

Dance classes usually have lots of single women if your hobby is more male oriented. You do not have to be a good dancer for the beginner classes.

I get that it can be frustrating to be constantly told that women do not want to be approached in public. I actually just looked up where to meet women after reading your comment and one article stood out because it was a woman who was trying to get hit on at the gym. She admitted that she is only up for being approached when she is getting water or leaving. Her showering that she was open to flirt with a specific person was by giving a smile which is something women generally say is absolutely not an invitation to flirt. She also mentioned giving bedroom eyes which I imagine is difficult for a guy to interpret on a sweaty woman. This woman turns out to be a dating coach.

I was lucky that Tinder was just starting out when I got a late start in dating.