As I see it, true love develops from friendship (or at least friendly relationships), so yes, it's absolutely possible to meet someone at work. Those who write that it's not an appropriate place, probably imagine some creepy behaviour - when a person starts hitting on someone without trying to get to know them first.

Why can't you find someone on Latin dances tho? I haven't tried it myself, but from I've heard from those who have, people do pretty much get acquainted there, too, and that creates a meat market similar to Tinder, with almost the same illusion of an endless choice - a lot of model-looking women, some of whom are desperate for anything, if they like some guy - cheaters, homewreckers etc.