Church, softball leagues, hiking clubs, community organizations, school clubs, night classes . . .
The good ones don’t line up on freeway on-ramps under a sign saying “Pick one”. Did you really expect to be able to sit under an apple tree and have women come up to you to introduce themselves?
Your age matters too. If you are below the drinking age, bars are out. If not, and you like women who like to drink, go to a bar. If you are over 60, the churches are full of lovely divorcees and widows.
Pick something you like to do that is co-ed and do it.
You might specify a city, too. If there was an apple tree full of women in Richmond, would you drive up there on weekends?
There is a reason your Q didn’t get any answers in many hours. Most of the people here are unwilling to suffer fools gladly.