What is Half A Bar?
50 pence. Or one half of one Great British Pound. A pound coin is gold in colour, hence the reference to a gold bar.
Blokeinnapub 1 "Oy! 'Ow much firra game o' pool iniss shittol 'en?"
Blokkeinnapub 2 "Arf a bar mate anna taker to er fuckincleaners annaw"
See flatley