The largest beer tasting involved 322 participants and was conducted by Warren McCoubrey at The Oast House (both UK) in Manchester, UK, on 7 August 2013.
The participants tasted three ales under the guidance of Warren McCoubrey, aka 'The Beer Guru'. The ales were Arizona, West Coast IPA and Wobbly Bob. 350 pints were served and there were 12 pourers.
Comments below may relate to previous holders of this record.