Tax on alcohol is so high it proportionately lowers the portion of added labour costs in a bar.
So if you pick an example lager, like Stella, it is £1.50 per pint in a can, and about £4.50 in a bar, so that example is 3x more expensive.
The raw cost of the product, so you made it yourself at a mass scale, is about £0.30/pint.
In USA the can is lower cost than UK in a can, but USA bar prices about the same as UK bar prices. But then you have more staff also in USA who work for tips so with tip I expect these end up a little higher in USA bar but for a better service, attention, e.g. no queuing and someone brings you another with less effort.
I can order beer in French and German, my ability to get white vs wheat beer is still not perfect 
I can never do decent Portugese so there it is deliberately walk into a semi-busy place, look at someone else’s beer and point at it to the bar tender.
I worked around the Caribbean and there’s less draft beer, more bottled and there is it much easier to just point, or in general just say the words “Seis Carib por favor” gets you a good result. The best places (I remember) was Trinidad. The lamb curry there I remembered it many times. 