Super-successful songwriter Guy Chambers' night Orgasmatron really is a treat, embracing everything from a piano soundclash to sitar players and beatboxers. Previous guests have included Lady Chann and The Noisettes, so you never know who might turn up, but tonight, the confirmed line-up goes something like this: Guy Chambers, The Go Sees, Vicky Butterfly, Scarlett Etienne and Jon Allen.