Proof of Concept is a studio exhibition held in November 2021 – an exhibition of furniture produced by Ex Hotel over the course of a year featuring one-offs and limited-run pieces of furniture. The exhibition was held in the workshop where these items were made in order to share a sense of process that produced these items, inviting viewers to also see the machines and tools that helped produce these works. The exhibition was generously brought together by The Ramp, both as a collaborator and co-organiser of the event.