At the opposite extreme I did come across an example of extreme tolerance last week.

Small singaround with perhaps 15 people in the front bar in a hotel. Someone singing a song when I heard a noise outside that suggested that perhaps a morris team had arrived. After a little bit of discussion with the landlady and chap who runs the singaround, in comes a chap pushing another guy in a wheelchair who was suffering from some form of mental disability BUT WAS ARMED WITH A FULL SIZE TAMBOURINE - a dangerous weapon at the best of times.

Guy sitting next to the visitor continues singing his acoustic song and thanks the visitor and his friend at the end, which struck me as either incredibly pc or unimaginably tolerant as the highlight of the piece had been the guy in the wheelchair smashing himself over the head with the tambourine in a random fashion which I have to say I would have found difficult.

Unfortunately they didn't stay for the rest of the evening.