I was in a Cardiff pub many years ago when Arthur Pendragon announced his presence towards last orders. He then cajoled most of the drinkers into joining hands in a big circle and having a dance in the courtyard after kicking-out time. He said he was in town for an "inter-faith concert with the Right Reverend Lional Fanthorpe at Raja's Snooker Club" the next evening, obviously.
Ok, Arthur Pendragon is a druid (indeed, Britain's top druid) and not a knight, but still, as sightings go it seems in the same ballpark.
Biting the hand that feeds IT
