My recollection, mid to late 80s, was it full of police, fire brigade and nurses/ medical staff.
I aimed for the nurses. I missed, frequently, but often got chatted up by big, burly coppers with bad mussies, and sometimes men too
There was a fair few from legal circles who drank in there too, solicitors, barristers and clerks, plus a smattering of teachers ( most tended favour the Blue Angel for some reason )
The girl who bought it ( Sarah, worked behind the bar - looked like Miss Piggy in pvc ) bought it at just as the smoking ban came in and lost a fortune.