I'm sure we've all met a few over the years, with various foibles and peccadilloes. For example, one guy I knew used to have the volume control and a reject button for the pub's jukebox behind the bar. If someone chose a track he really didn't like, he'd turn the volume right down, shout 'Cab for Mr.X' and reject the disc!
However, he pales into insignificance compared to the semi-mythical 'Trevor' of the now closed Bowling Green in Otley. (Possibly a future JDW). Quite simply, it's the most bizarre pub I've ever been in. Last time I was there last orders were sounded on a hand wound siren. The table top was a coffin lid. Have a look at the interview with local writer and presenter Ian Clayton. Trevor's got more outfits than Mr. Benn!
http://www.youtube.com/watch?v=LukVPxvE_7g
Any others?