FWIW, I'm in China
So I frequent 2 bars, next to each other in the same building. Basically cookie cutters of each other, one has a unisex bathroom with 4 stalls and one has gendered bathrooms, bathroom 1 with 3 urinals and 1 stall, bathroom 2 with 2 stalls.
I've not had issues with either the unisex or the gendered bathrooms, but the line is simply noticably longer for the unisex bathroom. In a densely populated situation where people are drinking a lot of beer and space is a premium, fitting 4 people peeing at the same time on a Saturday night vs 3 in urinals + 1 (in men's) and 2 (in women's) decongests the whole process by a lot.