A city with a thriving singles population -- otherwise, there will not be a pool of individuals to meet and date among.
What should singles be looking for when choosing a city? Be sure to live somewhere with parks or opportunities to hike.
In addition to job and cost-of-living considerations, choose a city that provides opportunities for you to explore your interests and values. This will afford you opportunities to make friends with similar interests, which promotes higher levels of well-being and life satisfaction.
This is likely to reduce conflict during transitions -- periods that are often associated with high levels of stress and strain on relationships.
With the rise of dating apps and therefore dates, what financial advice do you have targeted to singles on a budget? It would be more cost-effective to use one of the online matching sites.
I think singles would be quite interested in dining establishments, and places where they could go to meet potential partners (so, a thriving night life, but not a nightlife that primarily caters to short-term mating).