Dear Sir,my own mother,who is Ghanian,a muslim,and has recently decided to "come out",has found no examples of persecution,as she sits at our local,smoking her pipe.
Maybe our village is more tolerant of individuals rights,than your own.
I will send you a visa application form,so you can visit.
...and to get back to the original OP's dilema,of working on a smoking area at a pub...if you were prepared to go anyway,you obviously have no concerns about accepting work from an establishment predominantly ran,for the ingesting of a substance,predominantly taken for pleasure,almost always to excess,with the resulting fall-out,readily viewed on our streets,and in our hospitals...
You can all drink and smoke yourselves to oblivion,while i sit back and gaze in sympathy,from the comfort of my opium-den.