Drinking establishments comprise uses such as a public house, wine bar or other drinking establishment. The 2020 Business and Planning Act removed them from their former Class A4 use - they are now classified as 'sui generis' which means they are a use beyond classification and do not benefit from any permitted development right to move to any other use.
The full regulations can be accessed here: https://www.legislation.gov.uk/uksi/2020/757/made