a mate of mine once went to harrods wearing a pair of helmut lang jeans that had some effect that made them look like they had paint splattered on them. the door guy wouldn't let him in because he said he was wearing "site clothes". my mate tried to tell him that a) he'd bought the jeans from harrods just like that, and that b) he was a television producer, but to no avail.
Serve him right too.