I know a lot of quality good looking single girls who are professional jobs.
They are asking the same question. The issues with them is that they are not willing to put themselves out there.
They use tinder maybe once or twice, few duds and give up on internet dating all together
try to get set up to no avail. and simply start to give up or settle for the next guy they meet.
Girls these days are putting marriage off later and later so there is less and less urgency to find someone. Hence less effort going out actively meeting people.
Once you're past a certain age. Bars and clubs are a waste of time really. You just stick out like a sore thumb
Pubs and bars are social groups. Pretty much have to become a pickup artist and that is a whole new set of skill sets noone past the age of early 20's have the time to really learn.