Last weekend I went to a Silent Disco in the Big Top – a venue that’s erected for the Galway Arts Festival every year. The premise is that everyone is given a pair of wireless headphones, and there are two channels where different DJs compete for the crowd’s affections. At first I thought it would be quite weird, but it turned out to be great fun. It’s a strange combination of feeling liberated by wearing headphones and yet being part of a crowd experience. It’s interesting to watch the dynamics of the responses in the crowd as one DJ falls out of favour and another one catches on. There was…