As someone who used to be self-employed and living in East Dulwich I have to point out that Caffe Nero is the only place you can really work - it's not possible anywhere else, so if it bothers you that much why not just go to one of the other million coffee places on Lordship Lane! It's not freeloading, it's just a way of getting out of the house, not everyone can have a lovely office to work in. Also, I'm quite sure that if you ask someone for a chair they'd be more than happy to give it to you.