Russians drink anywhere and everywhere. Including cops themselves. Polish and Slovaks too. Ukraine has war related prohibition, other then that? Where exactly eastern is it not allowed (or not completely normalized to the point locals would be surprised there is such law)?

> Eastern parts (except Czechia)

Which "eastern parts"? I've never seen that rule here, but have seen people drinking in public. Do you know that or are you just asking AI to confirm your biases?

Well, at least the Finnish laws against it aren't enforced at all and public drinking is very common. Judging by what I've seen, it seems to be the case in Sweden too.