Legit though, why be rude to a fellow for rolling up politely as a dude? Like, if he's hitting on you and it isn't welcome, you tell them up bugger off politely. But just someone looking for some conversation? Man, I actually dislike strangers in general, I've got PTSD issues. But I still wouldn't automatically push the guy away without a solid explanation. And I'm actually known for being blunt about things in public. But when you go to some places, including bars, there's an assumption that it's a shared space and you treat other people as well as they'll allow.

Like, if you aren't willing to be polite and at least explain why a stranger isn't welcome in your group, maybe a bar isn't the best place to meet up? Nobody is obligated to welcome them in with open arms if they don't want to, but you do it nicely because that's a fellow human being trying to be social and friendly. You say, "hey man, sorry, this is an in group situation, we're here as an established group doing our thing." You don't dis them, you don't act like they're bad for looking at you and your group and thinking "maybe those dudes could be cool to hang with". That's a good thing if someone thinks you and your crew are interesting.

I dunno, maybe I'm fucking weird, but as much as I hate crowded places, and dislike random contact, I can't think of a single time where I would have rejected someone without a friendly explanation why.

We gotta be better to each other. We don't all hang the be friends, but we can be nice about it, can't we?