The EU spent three decades trying to persuade the UK to adapt, but in the face of staunch opposition, including from a pressure group called the ‘Metric Martyrs’, in 2007 it agreed that pints of beer could stay.
Ireland also have pints.
Many of the whinges are because the EU wanted those selling Imperial measures to give metric information as well. Since US pints are around 20% smaller than UK ones, doesn't it make sense to specify how many ml to expect?