I'm really not sure what sessions chips and peas and snappy dresser are going to. I have had the good fortune to visit quite a number of folk clubs/sessions/singarounds in the last few years and have come across very few people dressed in the way that they suggest. There isn't a uniform - most folks dress to suit themselves and to be comfortable.

A lot of the events I've attended have been held in pubs and there tends to be a much lower standard of dress and 'bad diet and lack of exercise' amongst the non folkie locals from what I have seen. If you want to see scruffy, fashion victims and bad physical condition head to any popular shopping area on a Saturday afternoon, or to a football match or rock concert. I don't notice that those events drive people away because of the standard of dress and physical condition of those attending.