>>33283252 (OP)Just be extraordinarily friendly, smile, and ask them out. Lots of these people are trapped insider their „life-is-shit“-loop. They are used to get mirrored. Just don‘t do, and just ignore the usual ranting that first come out of their mouths. After some minutes they open up.
I cracked three people in my neighbourhood like this in the last weeks, and countless at work since I know.