When all else fails......

..........drop into a coffee shop.

Like most blippers I don't always find it easy to ask strangers if I can photograph them, and I, at least, need to be in the right mood.
I find it helps if I can suss out the lovely young gels in black who work in coffee shops and assess who would be open to a blip.
I then zero in on the most open face and, as in this case, sometimes get lucky.