Fun tickling one’s braincells, exercising one’s mathematical memories, exchanging brain fluids (more hygienic than other fluids shared by humans) at the 3rd MathsJam to be held in Hertfordshire, UK. The newest MathsJam,, as far as I know, and thriving with a respectable membership list of members with very varying expertise and interest in maths or numbers (my particular passion). Open to all over 18s.