Back in the 1990s I can recall seeing them, sometimes in the windows of pubs I refrained from entering, sometimes in pubs I entered and left immediately. But I honestly can't remember seeing them for a good few years now, thank God. If I did I imagine I'd ask the licensing authorities to intervene.

Of course that doesn't mean there aren't going to be pubs that try to discriminate in other ways that are less likely to get them into trouble. But I am pretty sure that it is not accurate to say that overt signs are 'common' these days.