Yes, and this was quite painful.
Original band I was in was playing one of it's first big (to us) support slots to Embrace. Venue was The Ulster Hall in Belfast - legendary for many reasons, not least being that Led Zeppelin played there and I had seen the Chili Peppers on the Blood Sugar Sex Magik tour and had my mind blown by the Rollins Band who were opening - point being that it is very hallowed ground indeed.
My bands label guy flies in an old colleague from his Sony days in London. Nice guy, how do you do, etc but I am way more distracted by 'F*****k me, I'm playing the Ulster Hall'. The embarrassing part comes in that I'm wearing my Einsturzende Neubauten hoodie and not noticing that this guy is giving me a somewhat curious look the whole time. A mere two days pass before I'm driving down the road when it hits me - 'That was Mark Chung from Neubauten!!!!!' He was their old bassist and I have watched that guy on videos countless times, so a quality 'Doh!!!!' moment. A very apologetic email was forwarded on to Sony later that evening.