More generally internationally, if one is a single man and others around are couples, socializing is rarely going to be welcome because one is just a third wheel and people will wonder why you're alone. I have seen this firsthand in the bikepacking community, which went from once being a hobby largely of solo men (who would often then team up for some time) to being predominantly couples on many popular routes.
[–] triceratops 2 hours ago
[–] TFNA 2 hours ago
As for asking people for directions, there is a strong social pressure towards trying to solve things on your own instead of talking to random local people, and today everyone has smartphones with map apps.
The OP, however, was talking about supposedly being able to meet new friends and form bonds through public spaces, and that goes beyond the "saying a few pleasantries and then going about your day" that you mention. If your expectations do not necessarily apply to other countries, obviously his were completely unrealistic.
[–] triceratops 1 hour ago
Wow TIL.
Obviously you wouldn't speak to someone seated at another table at a restaurant. But what if you're waiting in line to be seated, and it's taking a while? It'd be "taboo" to even acknowledge other diners waiting with you?
Saying a few pleasantries and continuing about your day is not the same as socializing.