Hey there, welcome to the forums!
Fellow Adelaidean here. There are a few places in SA where you can meet people, it just depends on the kinds of people you want to meet really. I'm not sure if you want specifics, but I can give some anyway.
If you do enjoy the party scene, or dancing, or just like a few drinks here and there, there are some more popular bars like Bank Street Social which tend to have a good crowd on weekends, otherwise some more underground/hidden bars like Maybe Mae which draw in quite a specific crowd of people who like cocktails. Pubs are another good place if this is your scene, particularly if there's some kind of sporting event on. The Lost Dice might even be good to check out if you're into board games.
If you're wanting to move away from the city, there are always places like Glenelg and Henley where there are several places suited to people looking to expand their social circles.
It may be worth having a look around on somewhere like Facebook, as these tend to have specific groups from local areas based on mutual love of a particular activity. This is also where you can find events that are being held around the place that you might be interested in. I'm not exactly sure where as they do vary, but there are sometimes singles events held at certain pubs or bars if that sounds like it might be good fun.
They're all my recommendations, otherwise switching gyms may even be beneficial, as I know several people who have met partners at the gym. A lot of people I know also met their partners at work (bars, clubs, hospitality, retail, etc.), although this is often easier said than done.
I hope this helps! Please feel free to chat some more if you'd like.
All the best, SB
