Garry is the stupid one. He will drink anything that is offered to him. He believes that he is immune to the effects of alcohol after falling into a cauldron of lager as a baby. (Or was that Obelix?) Outside of drinking, he is also a massive Michael Caine fan.
Barry is not as stupid as his brother Garry, but he is a lot more nervous and drinks a lot less booze. He is constantly worried about going out of business and that Dodgy Phil's plans to save the pub will not work.
The pub's only regular, Dodgy Phil is a stereotypical Cockney, constantly trying to think of some plan that will help Barry and Garry, even if it as dodgy as his name. The only thing he drinks is a small glass of some kind of clear liquid. What it is is unknown.