Studied electronic engineering for two years - the group I went in was like 111 dudes and 7 girls. Some dudes enrolled in electives from faculties like nursery or dentistry because the boys/girls ratio there was inversely proportional as in our faculty.
Church events work fine, too. My buddy and me went to one in a damp basement and it was about 30 people. 100% women. Average age about 22 I guess. All were dancing. They all immediately started staring at us as if we were edible. Within the hour, my buddy met what would soon become his GF, and I was approached by this amazing girl. I then went on a string of remarkable dates with her.
The kicker: It was a Christian event, but the girls we hooked up with weren't Christians at all.
ikr a lot of people go to Church events for "safer" socializing, even if they only attend the services on Christmas and Easter if that. If you're Catholic or Orthodox, it's more like a cultural thing. (this may vary by area. Also it's not really safer, but your grandmother will say it is.)