Pubs not admitting women - certainly near Ashington in November 1968.
There was a social club in Edinburgh that banned women from going to the bar by themselves. This applied not only at their own events, but also when the hall had been hired for a private event.
On a vaguely related matter, wasn't there a rule (possibly enshrined in law) at one point that under-14s could not approach a bar where alcohol was sold, even if not purchasing anything. I remember as a kid (late 80s/early 90s) being told by my dad in a restaurant where food was table service, but drinks were served at a bar that I would not be allowed to go to the bar even to establish what soft drinks were available.
I definitely remember reading a newspaper article stating that the minimum age to go into a licensed premises alone (if not buying alcohol) was 14. On Christmas night in 1997 (when I was 14) I went to the hotel bar near me alone and asked if it would be OK for me to come in. I was told yes, but that I would not be served alcohol. I bought a cola and a pack of crisps.
In February 1998, I returned and asked for a cola and some crisps again. This time I didn't ask if it was OK as it would have been my second solo visit and my fourth visit overall (having been in the bar in May 1994 at the age of 10 with my 8-year-old friend and my friend's mum then in July 1996 at the age of 12 with my own parents). The barmaid point blank refused to serve me and insisted that I would need to go to the corner shop (not the exact expression used). Several customers backed the barmaid and insisted that even if 14-year-olds could go into pubs, that I looked much younger than 14 anyway!