A rassist village dance

On a sunny day, D, my previous housemate told me that she wants to go to a ballroom dance event at her local village hall. OK, I miss quickstep and waltz, so I decided to join. So the village paper advert said the dance is at 6 with a class at 8. Strange time, but maybe the hall is not available after the class. So we assumed it is social dancing at the beginning. Got there and were approached in a non-friendly way "What do you want?" J explained that we saw advert in the local news. They said this class is too advanced for us (how do they know, that we are Chinese and cannot dance European dances). Anyway, I had taken a long bus journey, so decided to wait until the class. But because the hall was freezing I was dancing on my own at the side. D decided to join me and we had no intention in interfering with the class, just to dance at the side. We were told we cannot join this class unless the teaches has seen us dancing. But other people were nice, including teacher and I got my long-missed quickstep and waltz! Cannot imagine this kind of thing happening in salsa....even when I went to tango once, total beginner, they did try to scare me away.