I went into a busy Birmingham pub one lunchtime and tried to get served by the barman who was working at one end of the bar. After several minutes of trying to catch his eye, I gave up and tried to get served by the barman who was serving customers at the far end of the bar. Again, no luck. Then I felt a tap on my shoulder and turned round to be told by the manager "Come on now. You know that you're barred and you can see that you're not going to get served, so let's have you on your way, shall we?".
It was only when I told him that I'd only been in Birmingham, for the first time in my life, for a mere twenty minutes (and he realised that I'd not got a Brummie accent) that he realised that I must have a double!
Actually most of my doubles seem to frequent pubs. Several times people have mentioned seeing me in bars which I've been nowhere near at the time!