Co-ed sports teams, too especially those with down time like bowling and softball. Adult sport leagues are also run by city recreation departments so this is a great way to meet people even after you’ve left college or if you move to a new city. It also sounds a bit like you connect better with slightly older adults so maybe looking outside the college scene to expand your network will help. There are also maker, hacker type events that you may enjoy meeting and networking with people. Sometimes these events will randomly group individuals so you don’t have to worry about showing up with a team. If you see an event that looks like teams are pre-grouped contact an organizer and let them know you’d be available to join any team looking for an extra or would be willing to volunteer to help organize the event.