Alternate viewpoint...
This didn't happen to me, but to a friend....
His lot were a locally reasonably well-known Milton Keynes band back in the 1980s. They got a gig at some Buckinghamshire rural pub and turned up to find they'd be playing to a bored barperson and a dachshund (It may have been called Colin). Being troupers, they decided to treat it as rehearsal time and duly played their set.
Right at the end, and as they were contemplating a weary trip home, a massive, obviously wacked-out, knife-carrying (it was very visible) biker turned up, alone.
He started to dance to their last song. At the end he demanded an encore...warily, they obliged...when they finished and started to take off their instruments he demanded a further song. As he was approximately three times the size of all of them they concluded that it might be better to oblige....remote pub...bar person suddenly absent....
What ensued was a reprisal of their entire set, played by them in a state of abject and increasing terror and a strong feeling that they might never see their loved ones again, as this maniac biker lumbered menacingly around the dancefloor...
I think he eventually fell asleep.