Neither of those has ever been a real way to meet long term partners.

Historically (and by that I mean before dating apps), people mostly found significant others at work, at church, through family introductions, friend-of-friend connections, or even professional matchmakers. Encounters at bars were always meant for random hookups. And everything else (like spilling your drink on someone in the elevator and eventually getting married to them) is a hollywood storyline, not something that actually happened to a large number of people.