Kissing in public in Poland generally doesn't risk you a punch. I don't know where you're getting that, though I understand it's a pretty common — though completely misguided — Western view. My local gay club is quite peaceful (though inside they all have a grand ol' time — it's by far one of the rowdiest gay clubs I've been to).

In Slavic countries generally, who you have sex with is your own business. It's private. Nobody wants to know.