Americans are funny about this. Sure you don’t go next to someone if there is space but you wouldn’t not use one.
I was talking a piss in a bar in America and cracked up a conversation with the guy next to me and realised he found it very unusual. I said (at the sinks) that doesn’t happen here much does it? He goes no does it happen back home? I was like yea sure if you’re drunk. Americans seem too worried if you’re gay but who doesn’t love a bit of straight guy on straight guy homoeroticism every now and then (not that pissing next to someone is).
Also trough is the best when there is a fuckload of people like at a stadium otherwise it takes for ever. The guys that use the cubical for a piss and hold everyone up are wankers. Though I once called a guy out on it at work and he said “I don’t know what it is! I just can’t pee around people! I’ve tried, it’s not like I’m embarrassed. I’ll show you my ddick if you want, I don’t care I just can’t pee next to someone.” I almost pissed over myself I was laughing so much.