Best bars for single 20 something year olds

Single 27F here. I know I'm not the only one feeling like it's getting increasingly harder to meet people. I was wondering if anyone has any suggestions on where I could go either alone or with friends to meet people. Dating apps just aren't doing it for me anymore and people don't approach one another like they used to. I've just moved back into the city after a few years of moving around and living in smaller towns so I don't know what it's like in the bars/pubs these days. Any suggestion is greatly appreciated :)